diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index c482ad34fb7080..57da742e5ca74c 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -18,7 +18,7 @@ updates:
     exclude-paths:
       - 'gc/mmtk/**'
     schedule:
-      interval: 'daily'
+      interval: 'monthly'
     groups:
       jit:
         patterns:
diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
index 596e214eea3c11..147470f38a9988 100644
--- a/.github/workflows/compilers.yml
+++ b/.github/workflows/compilers.yml
@@ -93,8 +93,6 @@ jobs:
       - { uses: './.github/actions/compilers', name: 'GCC 11', with: { tag: 'gcc-11' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'GCC 10', with: { tag: 'gcc-10' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'GCC 9',  with: { tag: 'gcc-9'  }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'GCC 8',  with: { tag: 'gcc-8'  }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'GCC 7',  with: { tag: 'gcc-7'  }, timeout-minutes: 5 }
 
   compile3:
     name: 'omnibus compilations, #3'
@@ -107,9 +105,6 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with: { sparse-checkout-cone-mode: false, sparse-checkout: /.github, persist-credentials: false }
       - { uses: './.github/actions/setup/directories', with: { srcdir: 'src', builddir: 'build', makeup: true, fetch-depth: 10 } }
-      - { uses: './.github/actions/compilers', name: 'clang 23', with: { tag: 'clang-23' }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'clang 22', with: { tag: 'clang-22' }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'clang 21', with: { tag: 'clang-21' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'clang 20', with: { tag: 'clang-20' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'clang 19', with: { tag: 'clang-19' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'clang 18', with: { tag: 'clang-18' }, timeout-minutes: 5 }
@@ -204,8 +199,6 @@ jobs:
       - { uses: './.github/actions/compilers', name: 'disable-rubygems',    with: { append_configure: '--disable-rubygems' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'RUBY_DEVEL',          with: { append_configure: '--enable-devel' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=0',            with: { cppflags: '-DOPT_THREADED_CODE=0' }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=1',            with: { cppflags: '-DOPT_THREADED_CODE=1' }, timeout-minutes: 5 }
-      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=2',            with: { cppflags: '-DOPT_THREADED_CODE=2' }, timeout-minutes: 5 }
 
   compile8:
     name: 'omnibus compilations, #8'
@@ -263,6 +256,9 @@ jobs:
       - { uses: './.github/actions/compilers', name: 'SHARABLE_MIDDLE_SUBSTRING',      with: { cppflags: '-DSHARABLE_MIDDLE_SUBSTRING=1' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'DEBUG_FIND_TIME_NUMGUESS',       with: { cppflags: '-DDEBUG_FIND_TIME_NUMGUESS' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'DEBUG_INTEGER_PACK',             with: { cppflags: '-DDEBUG_INTEGER_PACK' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=1',            with: { cppflags: '-DOPT_THREADED_CODE=1' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'OPT_THREADED_CODE=2',            with: { cppflags: '-DOPT_THREADED_CODE=2' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 21', with: { tag: 'clang-21' }, timeout-minutes: 5 }
 
   compileB:
     name: 'omnibus compilations, #11'
@@ -298,6 +294,10 @@ jobs:
       - { uses: './.github/actions/compilers', name: 'VM_DEBUG_VERIFY_METHOD_CACHE',   with: { cppflags: '-DVM_DEBUG_VERIFY_METHOD_CACHE' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'YJIT_FORCE_ENABLE',              with: { cppflags: '-DYJIT_FORCE_ENABLE' }, timeout-minutes: 5 }
       - { uses: './.github/actions/compilers', name: 'UNIVERSAL_PARSER',               with: { cppflags: '-DUNIVERSAL_PARSER' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 23', with: { tag: 'clang-23' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'clang 22', with: { tag: 'clang-22' }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 8',  with: { tag: 'gcc-8'  }, timeout-minutes: 5 }
+      - { uses: './.github/actions/compilers', name: 'GCC 7',  with: { tag: 'gcc-7'  }, timeout-minutes: 5 }
 
   compilemax:
     name: 'omnibus compilations, result'
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index f3d34858953069..d355e4f4abb4a9 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -175,7 +175,7 @@ jobs:
   result:
     if: ${{ always() }}
     name: ${{ github.workflow }} result
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     needs: [make]
     steps:
       - run: exit 1
diff --git a/.github/workflows/yjit-macos.yml b/.github/workflows/yjit-macos.yml
index 0f7fe0556b5a86..6e0827c8fe3ee6 100644
--- a/.github/workflows/yjit-macos.yml
+++ b/.github/workflows/yjit-macos.yml
@@ -188,7 +188,7 @@ jobs:
   result:
     if: ${{ always() }}
     name: ${{ github.workflow }} result
-    runs-on: macos-14
+    runs-on: ubuntu-latest
     needs: [make]
     steps:
       - name: ${{ github.workflow }} jobs have failed
diff --git a/.github/workflows/zjit-macos.yml b/.github/workflows/zjit-macos.yml
index 334ed898d8463b..40ff83365b4e1c 100644
--- a/.github/workflows/zjit-macos.yml
+++ b/.github/workflows/zjit-macos.yml
@@ -164,7 +164,7 @@ jobs:
   result:
     if: ${{ always() }}
     name: ${{ github.workflow }} result
-    runs-on: macos-14
+    runs-on: ubuntu-latest
     needs: [make]
     steps:
       - run: exit 1
diff --git a/Cargo.lock b/Cargo.lock
index d749b2e071e253..eddcc784246802 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anyhow"
+version = "1.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a23eb6b1614318a8071c9b2521f36b424b2c83db5eb3a0fead4a6c0809af6e61"
+
 [[package]]
 name = "autocfg"
 version = "1.5.0"
@@ -14,6 +20,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
+
 [[package]]
 name = "capstone"
 version = "0.14.0"
@@ -35,12 +47,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.18"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525046617d8376e3db1deffb079e91cef90a89fc3ca5c185bbf8c9ecdd15cd5c"
-dependencies = [
- "shlex",
-]
+checksum = "17f6e324229dc011159fcc089755d1e2e216a90d43a7dea6853ca740b84f35e7"
 
 [[package]]
 name = "cfg-if"
@@ -48,6 +57,17 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "chacha20"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "rand_core",
+]
+
 [[package]]
 name = "console"
 version = "0.16.3"
@@ -59,12 +79,27 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "cpufeatures"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "encode_unicode"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
 
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
 [[package]]
 name = "errno"
 version = "0.3.14"
@@ -84,29 +119,76 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "foldhash"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0d2fde1f7b3d48b8395d5f2de76c18a528bd6a9cdde438df747bfcba3e05d6f"
+
 [[package]]
 name = "getrandom"
-version = "0.3.4"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
 dependencies = [
  "cfg-if",
  "libc",
  "r-efi",
+ "rand_core",
  "wasip2",
+ "wasip3",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.15.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
+dependencies = [
+ "foldhash",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
+
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
+[[package]]
+name = "id-arena"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
+
+[[package]]
+name = "indexmap"
+version = "2.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
+dependencies = [
+ "equivalent",
+ "hashbrown 0.16.1",
+ "serde",
+ "serde_core",
+]
+
 [[package]]
 name = "insta"
-version = "1.47.0"
+version = "1.47.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f40e41efb5f592d3a0764f818e2f08e5e21c4f368126f74f37c81bd4af7a0c6"
+checksum = "99322078b2c076829a1db959d49da554fabc4342257fc0ba5a070a1eb3a01cd8"
 dependencies = [
  "console",
  "once_cell",
@@ -134,15 +216,27 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
+
 [[package]]
 name = "jit"
 version = "0.1.0"
 
+[[package]]
+name = "leb128fmt"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
+
 [[package]]
 name = "libc"
-version = "0.2.171"
+version = "0.2.163"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
+checksum = "1fdaeca4cf44ed4ac623e86ef41f056e848dbeab7ec043ecb7326ba300b36fd0"
 
 [[package]]
 name = "linux-raw-sys"
@@ -151,59 +245,81 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef53942eb7bf7ff43a617b3e2c1c4a5ecf5944a7c1bc12d7ee39bbb15e5c1519"
 
 [[package]]
-name = "once_cell"
-version = "1.21.3"
+name = "log"
+version = "0.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+checksum = "518ef76f2f87365916b142844c16d8fefd85039bc5699050210a7778ee1cd1de"
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.17"
+name = "memchr"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+checksum = "76fc44e2588d5b436dbc3c6cf62aef290f90dab6235744a93dfe1cc18f451e2c"
 
 [[package]]
-name = "r-efi"
-version = "5.3.0"
+name = "once_cell"
+version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
 [[package]]
-name = "rand"
-version = "0.9.2"
+name = "prettyplease"
+version = "0.2.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
- "rand_chacha",
- "rand_core",
+ "proc-macro2",
+ "syn",
 ]
 
 [[package]]
-name = "rand_chacha"
-version = "0.9.0"
+name = "proc-macro2"
+version = "1.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+checksum = "89ae43fd86e4158d6db51ad8e2b80f313af9cc74f5c0e03ccb87de09998732de"
 dependencies = [
- "ppv-lite86",
- "rand_core",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "rand_core"
-version = "0.9.5"
+name = "quote"
+version = "1.0.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "r-efi"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
+
+[[package]]
+name = "rand"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+checksum = "bc266eb313df6c5c09c1c7b1fbe2510961e5bcd3add930c1e31f7ed9da0feff8"
 dependencies = [
+ "chacha20",
  "getrandom",
+ "rand_core",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
+
 [[package]]
 name = "redox_syscall"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
 ]
 
 [[package]]
@@ -220,7 +336,7 @@ version = "0.37.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "519165d378b97752ca44bbe15047d5d3409e875f39327546b42ac81d7e18c1b6"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "errno",
  "io-lifetimes",
  "libc",
@@ -229,10 +345,57 @@ dependencies = [
 ]
 
 [[package]]
-name = "shlex"
-version = "1.3.0"
+name = "ryu"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
+
+[[package]]
+name = "semver"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56e6fa9c48d24d85fb3de5ad847117517440f6beceb7798af16b4a87d616b8d0"
+
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.143"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d401abef1d108fbd9cbaebc3e46611f4b1021f714a0597a71f41ee463f5f4a5a"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
 
 [[package]]
 name = "similar"
@@ -246,6 +409,17 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "syn"
+version = "2.0.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e665b8803e7b1d2a727f4023456bbbbe74da67099c585258af0ad9c5013b9b99"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "tempfile"
 version = "3.6.0"
@@ -260,13 +434,68 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
+
 [[package]]
 name = "wasip2"
 version = "1.0.1+wasi-0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0562428422c63773dad2c345a1882263bbf4d65cf3f42e90921f787ef5ad58e7"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.46.0",
+]
+
+[[package]]
+name = "wasip3"
+version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
+dependencies = [
+ "wit-bindgen 0.51.0",
+]
+
+[[package]]
+name = "wasm-encoder"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "990065f2fe63003fe337b932cfb5e3b80e0b4d0f5ff650e6985b1048f62c8319"
+dependencies = [
+ "leb128fmt",
+ "wasmparser",
+]
+
+[[package]]
+name = "wasm-metadata"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0e353e6a2fbdc176932bbaab493762eb1255a7900fe0fea1a2f96c296cc909"
+dependencies = [
+ "anyhow",
+ "indexmap",
+ "wasm-encoder",
+ "wasmparser",
+]
+
+[[package]]
+name = "wasmparser"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
+dependencies = [
+ "bitflags 2.11.0",
+ "hashbrown 0.15.5",
+ "indexmap",
+ "semver",
 ]
 
 [[package]]
@@ -429,6 +658,94 @@ version = "0.46.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f17a85883d4e6d00e8a97c586de764dabcc06133f7f1d55dce5cdc070ad7fe59"
 
+[[package]]
+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
+dependencies = [
+ "wit-bindgen-rust-macro",
+]
+
+[[package]]
+name = "wit-bindgen-core"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea61de684c3ea68cb082b7a88508a8b27fcc8b797d738bfc99a82facf1d752dc"
+dependencies = [
+ "anyhow",
+ "heck",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-bindgen-rust"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
+dependencies = [
+ "anyhow",
+ "heck",
+ "indexmap",
+ "prettyplease",
+ "syn",
+ "wasm-metadata",
+ "wit-bindgen-core",
+ "wit-component",
+]
+
+[[package]]
+name = "wit-bindgen-rust-macro"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c0f9bfd77e6a48eccf51359e3ae77140a7f50b1e2ebfe62422d8afdaffab17a"
+dependencies = [
+ "anyhow",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wit-bindgen-core",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "wit-component"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
+dependencies = [
+ "anyhow",
+ "bitflags 2.11.0",
+ "indexmap",
+ "log",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "wasm-encoder",
+ "wasm-metadata",
+ "wasmparser",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-parser"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "semver",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "unicode-xid",
+ "wasmparser",
+]
+
 [[package]]
 name = "yjit"
 version = "0.1.0"
diff --git a/parse.y b/parse.y
index bcff7918bfa4c3..170ed08a5e87a7 100644
--- a/parse.y
+++ b/parse.y
@@ -2773,7 +2773,7 @@ rb_parser_ary_free(rb_parser_t *p, rb_parser_ary_t *ary)
 %type <node> if_tail opt_else case_body case_args cases opt_rescue exc_list exc_var opt_ensure
 %type <node> args arg_splat call_args opt_call_args
 %type <node> paren_args opt_paren_args
-%type <node_args> args_tail block_args_tail block_args-opt_tail
+%type <node_args> args_tail block_args_tail
 %type <node> command_args aref_args
 %type <node_block_pass> opt_block_arg block_arg
 %type <node> var_ref var_lhs
@@ -2798,7 +2798,7 @@ rb_parser_ary_free(rb_parser_t *p, rb_parser_ary_t *ary)
 %type <node> p_value p_primitive p_variable p_var_ref p_expr_ref p_const
 %type <node> p_kwargs p_kwarg p_kw
 %type <id>   keyword_variable user_variable sym operation2 operation3
-%type <id>   cname fname op f_rest_arg f_block_arg opt_f_block_arg f_norm_arg f_bad_arg
+%type <id>   cname fname op f_rest_arg f_block_arg opt_comma f_norm_arg f_bad_arg
 %type <id>   f_kwrest f_label f_arg_asgn call_op call_op2 reswords relop dot_or_colon
 %type <id>   p_kwrest p_kwnorest p_any_kwrest p_kw_label
 %type <id>   f_no_kwarg f_any_kwrest args_forward excessed_comma nonlocal_var def_name
@@ -2923,18 +2923,18 @@ rb_parser_ary_free(rb_parser_t *p, rb_parser_ary_t *ary)
                     }
                 ;
 
-%rule args_tail_basic(value) <node_args>
-                : f_kwarg(value) ',' f_kwrest opt_f_block_arg
+%rule args_tail_basic(value, trailing) <node_args>
+                : f_kwarg(value) ',' f_kwrest opt_f_block_arg(trailing)
                     {
                         $$ = new_args_tail(p, $1, $3, $4, &@3);
                     /*% ripper: [$:1, $:3, $:4] %*/
                     }
-                | f_kwarg(value) opt_f_block_arg
+                | f_kwarg(value) opt_f_block_arg(trailing)
                     {
                         $$ = new_args_tail(p, $1, 0, $2, &@1);
                     /*% ripper: [$:1, Qnil, $:2] %*/
                     }
-                | f_any_kwrest opt_f_block_arg
+                | f_any_kwrest opt_f_block_arg(trailing)
                     {
                         $$ = new_args_tail(p, 0, $1, $2, &@1);
                     /*% ripper: [Qnil, $:1, $:2] %*/
@@ -2946,6 +2946,15 @@ rb_parser_ary_free(rb_parser_t *p, rb_parser_ary_t *ary)
                     }
                 ;
 
+%rule opt_f_block_arg(trailing) <id>
+                : ',' f_block_arg
+                    {
+                        $$ = $2;
+                    /*% ripper: $:2 %*/
+                    }
+                | trailing
+                ;
+
 %rule def_endless_method(bodystmt) <node>
                 : defn_head[head] f_opt_paren_args[args] '=' bodystmt
                     {
@@ -3087,13 +3096,13 @@ rb_parser_ary_free(rb_parser_t *p, rb_parser_ary_t *ary)
                     }
                 ;
 
-%rule opt_args_tail(tail) <node_args>
+%rule opt_args_tail(tail, trailing) <node_args>
                 : ',' tail
                     {
                         $$ = $tail;
                     /*% ripper: $:tail %*/
                     }
-                | /* none */
+                | trailing
                     {
                         $$ = new_empty_args_tail(p, &@$);
                     /*% ripper: [Qnil, Qnil, Qnil] %*/
@@ -4973,10 +4982,7 @@ f_any_kwrest	: f_kwrest
 
 f_eq		: {p->ctxt.in_argdef = 0;} '=';
 
-block_args_tail	: args_tail_basic(primary_value)
-                ;
-
-block_args-opt_tail : opt_args_tail(block_args_tail)
+block_args_tail	: args_tail_basic(primary_value, none)
                 ;
 
 excessed_comma	: ','
@@ -4987,14 +4993,14 @@ excessed_comma	: ','
                     }
                 ;
 
-block_param	: args-list(primary_value, block_args-opt_tail)
+block_param	: args-list(primary_value, opt_args_tail(block_args_tail, none))
                 | f_arg[pre] excessed_comma
                     {
                         $$ = new_empty_args_tail(p, &@excessed_comma);
                         $$ = new_args(p, $pre, 0, $excessed_comma, 0, $$, &@$);
                     /*% ripper: params!($:pre, Qnil, $:excessed_comma, Qnil, Qnil, Qnil, Qnil) %*/
                     }
-                | f_arg[pre] opt_args_tail(block_args_tail)[tail]
+                | f_arg[pre] opt_args_tail(block_args_tail, none)[tail]
                     {
                         $$ = new_args(p, $pre, 0, 0, 0, $tail, &@$);
                     /*% ripper: params!($:pre, Qnil, Qnil, Qnil, *$:tail[0..2]) %*/
@@ -6240,7 +6246,7 @@ f_arglist	: f_paren_args
                     }
                 ;
 
-args_tail	: args_tail_basic(arg_value)
+args_tail	: args_tail_basic(arg_value, opt_comma)
                 | args_forward
                     {
                         add_forwarding_args(p);
@@ -6250,7 +6256,7 @@ args_tail	: args_tail_basic(arg_value)
                     }
                 ;
 
-largs_tail	: args_tail_basic(arg_value)
+largs_tail	: args_tail_basic(arg_value, none)
                 | args_forward
                     {
                         yyerror1(&@args_forward, "unexpected ... in lambda argument");
@@ -6331,14 +6337,9 @@ largs_tail	: args_tail_basic(arg_value)
                     }
                 ;
 
-%rule f_args-opt_tail(tail) <node_args>
-                : opt_args_tail(tail)
-                ;
-
-
-%rule f_args-list(tail) <node_args>
-                : args-list(arg_value, f_args-opt_tail(tail))
-                | f_arg[pre] opt_args_tail(tail)[tail]
+%rule f_args-list(tail, trailing) <node_args>
+                : args-list(arg_value, opt_args_tail(tail, trailing))
+                | f_arg[pre] opt_args_tail(tail, trailing)[tail]
                     {
                         $$ = new_args(p, $pre, 0, 0, 0, $tail, &@$);
                     /*% ripper: params!($:pre, Qnil, Qnil, Qnil, *$:tail[0..2]) %*/
@@ -6347,10 +6348,10 @@ largs_tail	: args_tail_basic(arg_value)
                 | f_empty_arg
                 ;
 
-f_args		: f_args-list(args_tail)
+f_args		: f_args-list(args_tail, opt_comma)
                 ;
 
-f_largs		: f_args-list(largs_tail)
+f_largs		: f_args-list(largs_tail, none)
                 ;
 
 args_forward	: tBDOT3
@@ -6538,12 +6539,11 @@ f_block_arg	: blkarg_mark tIDENTIFIER
                     }
                 ;
 
-opt_f_block_arg	: ',' f_block_arg
+opt_comma	: ','?
                     {
-                        $$ = $2;
-                    /*% ripper: $:2 %*/
+                        $$ = 0;
+                    /*% ripper: Qnil %*/
                     }
-                | none
                 ;
 
 
diff --git a/test/.excludes-zjit/TestOpenURI.rb b/test/.excludes-zjit/TestOpenURI.rb
new file mode 100644
index 00000000000000..f08a2d7e89b201
--- /dev/null
+++ b/test/.excludes-zjit/TestOpenURI.rb
@@ -0,0 +1,3 @@
+if RUBY_PLATFORM =~ /linux/
+  exclude(/test_/, 'randomly fails with SystemStackError (Shopify/ruby#964)')
+end
diff --git a/test/.excludes-zjit/TestOpenURISSL.rb b/test/.excludes-zjit/TestOpenURISSL.rb
new file mode 100644
index 00000000000000..f08a2d7e89b201
--- /dev/null
+++ b/test/.excludes-zjit/TestOpenURISSL.rb
@@ -0,0 +1,3 @@
+if RUBY_PLATFORM =~ /linux/
+  exclude(/test_/, 'randomly fails with SystemStackError (Shopify/ruby#964)')
+end
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 70e19568160d0e..2d04858bde46da 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -222,6 +222,16 @@ def test_no_block_argument_in_method
     assert_raise_with_message(ArgumentError, /block accepted/) {obj.f(&proc {})}
   end
 
+  def test_trailing_comma_in_method_parameters
+    assert_valid_syntax("def f(a,b,c,); end")
+    assert_valid_syntax("def f(a,b,*c,); end")
+    assert_valid_syntax("def f(a,b,*,); end")
+    assert_valid_syntax("def f(a,b,**c,); end")
+    assert_valid_syntax("def f(a,b,**,); end")
+    assert_syntax_error("def f(a,b,&block,); end", /unexpected/)
+    assert_syntax_error("def f(a,b,...,); end", /unexpected/)
+  end
+
   def test_no_block_argument_in_block
     assert_valid_syntax("proc do |&nil| end")
     assert_valid_syntax("proc do |a, &nil| end")
diff --git a/zjit/Cargo.lock b/zjit/Cargo.lock
index 1e7f1b3eec23ad..57418bdaa4c601 100644
--- a/zjit/Cargo.lock
+++ b/zjit/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "anyhow"
+version = "1.0.102"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
+
 [[package]]
 name = "bitflags"
 version = "2.10.0"
@@ -42,6 +48,17 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "chacha20"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f8d983286843e49675a4b7a2d174efe136dc93a18d69130dd18198a6c167601"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "rand_core",
+]
+
 [[package]]
 name = "console"
 version = "0.16.3"
@@ -53,12 +70,27 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "cpufeatures"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "encode_unicode"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
 
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
 [[package]]
 name = "errno"
 version = "0.3.14"
@@ -75,6 +107,12 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
 [[package]]
 name = "getrandom"
 version = "0.3.4"
@@ -83,15 +121,68 @@ checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
 dependencies = [
  "cfg-if",
  "libc",
- "r-efi",
+ "r-efi 5.3.0",
+ "wasip2",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi 6.0.0",
+ "rand_core",
  "wasip2",
+ "wasip3",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.15.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
+dependencies = [
+ "foldhash",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
+
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
+[[package]]
+name = "id-arena"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
+
+[[package]]
+name = "indexmap"
+version = "2.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7714e70437a7dc3ac8eb7e6f8df75fd8eb422675fc7678aff7364301092b1017"
+dependencies = [
+ "equivalent",
+ "hashbrown 0.16.1",
+ "serde",
+ "serde_core",
 ]
 
 [[package]]
 name = "insta"
-version = "1.47.0"
+version = "1.47.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f40e41efb5f592d3a0764f818e2f08e5e21c4f368126f74f37c81bd4af7a0c6"
+checksum = "99322078b2c076829a1db959d49da554fabc4342257fc0ba5a070a1eb3a01cd8"
 dependencies = [
  "console",
  "once_cell",
@@ -99,10 +190,22 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
+
 [[package]]
 name = "jit"
 version = "0.1.0"
 
+[[package]]
+name = "leb128fmt"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
+
 [[package]]
 name = "libc"
 version = "0.2.180"
@@ -115,6 +218,18 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df1d3c3b53da64cf5760482273a98e575c651a67eec7f77df96b5b642de8f039"
 
+[[package]]
+name = "log"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+
+[[package]]
+name = "memchr"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+
 [[package]]
 name = "once_cell"
 version = "1.21.1"
@@ -122,12 +237,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d75b0bedcc4fe52caa0e03d9f1151a323e4aa5e2d78ba3580400cd3c9e2bc4bc"
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.21"
+name = "prettyplease"
+version = "0.2.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
- "zerocopy",
+ "proc-macro2",
+ "syn",
 ]
 
 [[package]]
@@ -155,33 +271,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
-name = "rand"
-version = "0.9.2"
+name = "r-efi"
+version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
-dependencies = [
- "rand_chacha",
- "rand_core",
-]
+checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
 [[package]]
-name = "rand_chacha"
-version = "0.9.0"
+name = "rand"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+checksum = "bc266eb313df6c5c09c1c7b1fbe2510961e5bcd3add930c1e31f7ed9da0feff8"
 dependencies = [
- "ppv-lite86",
+ "chacha20",
+ "getrandom 0.4.2",
  "rand_core",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.9.5"
+version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
-dependencies = [
- "getrandom",
-]
+checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
 
 [[package]]
 name = "rustix"
@@ -196,6 +306,54 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d767eb0aabc880b29956c35734170f26ed551a859dbd361d140cdbeca61ab1e2"
+
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -232,7 +390,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "655da9c7eb6305c55742045d5a8d2037996d61d8de95806335c7c86ce0f82e9c"
 dependencies = [
  "fastrand",
- "getrandom",
+ "getrandom 0.3.4",
  "once_cell",
  "rustix",
  "windows-sys",
@@ -244,13 +402,62 @@ version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
+
 [[package]]
 name = "wasip2"
 version = "1.0.1+wasi-0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0562428422c63773dad2c345a1882263bbf4d65cf3f42e90921f787ef5ad58e7"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.46.0",
+]
+
+[[package]]
+name = "wasip3"
+version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
+dependencies = [
+ "wit-bindgen 0.51.0",
+]
+
+[[package]]
+name = "wasm-encoder"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "990065f2fe63003fe337b932cfb5e3b80e0b4d0f5ff650e6985b1048f62c8319"
+dependencies = [
+ "leb128fmt",
+ "wasmparser",
+]
+
+[[package]]
+name = "wasm-metadata"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0e353e6a2fbdc176932bbaab493762eb1255a7900fe0fea1a2f96c296cc909"
+dependencies = [
+ "anyhow",
+ "indexmap",
+ "wasm-encoder",
+ "wasmparser",
+]
+
+[[package]]
+name = "wasmparser"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
+dependencies = [
+ "bitflags",
+ "hashbrown 0.15.5",
+ "indexmap",
+ "semver",
 ]
 
 [[package]]
@@ -275,30 +482,98 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f17a85883d4e6d00e8a97c586de764dabcc06133f7f1d55dce5cdc070ad7fe59"
 
 [[package]]
-name = "yjit"
-version = "0.1.0"
+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
 dependencies = [
- "jit",
+ "wit-bindgen-rust-macro",
+]
+
+[[package]]
+name = "wit-bindgen-core"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea61de684c3ea68cb082b7a88508a8b27fcc8b797d738bfc99a82facf1d752dc"
+dependencies = [
+ "anyhow",
+ "heck",
+ "wit-parser",
 ]
 
 [[package]]
-name = "zerocopy"
-version = "0.8.47"
+name = "wit-bindgen-rust"
+version = "0.51.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efbb2a062be311f2ba113ce66f697a4dc589f85e78a4aea276200804cea0ed87"
+checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
 dependencies = [
- "zerocopy-derive",
+ "anyhow",
+ "heck",
+ "indexmap",
+ "prettyplease",
+ "syn",
+ "wasm-metadata",
+ "wit-bindgen-core",
+ "wit-component",
 ]
 
 [[package]]
-name = "zerocopy-derive"
-version = "0.8.47"
+name = "wit-bindgen-rust-macro"
+version = "0.51.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e8bc7269b54418e7aeeef514aa68f8690b8c0489a06b0136e5f57c4c5ccab89"
+checksum = "0c0f9bfd77e6a48eccf51359e3ae77140a7f50b1e2ebfe62422d8afdaffab17a"
 dependencies = [
+ "anyhow",
+ "prettyplease",
  "proc-macro2",
  "quote",
  "syn",
+ "wit-bindgen-core",
+ "wit-bindgen-rust",
+]
+
+[[package]]
+name = "wit-component"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
+dependencies = [
+ "anyhow",
+ "bitflags",
+ "indexmap",
+ "log",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "wasm-encoder",
+ "wasm-metadata",
+ "wasmparser",
+ "wit-parser",
+]
+
+[[package]]
+name = "wit-parser"
+version = "0.244.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "semver",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "unicode-xid",
+ "wasmparser",
+]
+
+[[package]]
+name = "yjit"
+version = "0.1.0"
+dependencies = [
+ "jit",
 ]
 
 [[package]]
@@ -311,3 +586,9 @@ dependencies = [
  "rand",
  "yjit",
 ]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
diff --git a/zjit/Cargo.toml b/zjit/Cargo.toml
index 63c514e483cc3b..14a512cab5cceb 100644
--- a/zjit/Cargo.toml
+++ b/zjit/Cargo.toml
@@ -12,8 +12,8 @@ capstone = { version = "0.14.0", optional = true }
 jit = { version = "0.1.0", path = "../jit" }
 
 [dev-dependencies]
-insta = "1.47.0"
-rand = "0.9"
+insta = "1.47.1"
+rand = "0.10"
 yjit = { path = "../yjit" }
 
 # NOTE: Development builds select a set of these via configure.ac
diff --git a/zjit/src/backend/parcopy.rs b/zjit/src/backend/parcopy.rs
index 8b8cec9251877e..614bf68dcd764a 100644
--- a/zjit/src/backend/parcopy.rs
+++ b/zjit/src/backend/parcopy.rs
@@ -117,7 +117,7 @@ pub fn sequentialize_register<T: PartialEq + Eq + Hash + Ord + std::fmt::Debug +
 
 #[cfg(test)]
 mod tests {
-    use rand::Rng;
+    use rand::RngExt;
     use std::collections::HashMap;
 
     use super::*;