[beta] backports

[cuviper]

• remove incorrect fast path remove incorrect fast path #146919
• Update LLVM to 21.1.2 Update LLVM to 21.1.2 #146953
• Fix infinite recursion in Path::eq with String Fix infinite recursion in Path::eq with String #146958
• Make #[link="dl"] an FCW rather than an error Make #[link="dl"] an FCW rather than an error #147262

r? cuviper

[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

  If this was not intentional, see I changed a submodule on accident in the rustc dev guide.

[cuviper]

@bors r+ p=1 rollup=never

[bors]

📌 Commit 98e2fd3 has been approved by cuviper

It is now in the queue for this repository.

[bors]

⌛ Testing commit 98e2fd3 with merge 93b26c2...

[bors]

💔 Test failed - checks-actions

[hkBst]

fails with: System.IO.IOException: No space left on device : '/home/runner/actions-runner/cached/_diag/Worker_20251003-040227-utc.log'

[cuviper]

Hmm, I don't see any CI changes on master for that kind of error -- maybe it was spurious?

@bors retry

[bors]

⌛ Testing commit 98e2fd3 with merge 12b7c51...

[bors]

💔 Test failed - checks-actions

[bors]

⌛ Testing commit 14243a9 with merge e76bb13...

[bors]

💔 Test failed - checks-actions

[jieyouxu]

collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped

Hm, maybe spurious?
@bors retry

[bors]

⌛ Testing commit 14243a9 with merge c04b0d1...

[bors]

💔 Test failed - checks-actions

[cuviper]

Two ld SIGBUS in a row doesn't seem spurious anymore, but nothing obvious has changed on our part. The distcheck job hasn't changed on master AFAICS, and I don't see any other CI jobs struggling with this. Let's give it another go...

@bors r+

[bors]

📌 Commit d215429 has been approved by cuviper

It is now in the queue for this repository.

[bors]

⌛ Testing commit d215429 with merge 664f2e1...

[rust-log-analyzer]

The job x86_64-gnu-distcheck failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[RUSTC-TIMING] rustc_query_impl test:false 267.011
   Compiling rustc_driver v0.0.0 (/checkout/compiler/rustc_driver)
error: linking with `cc` failed: exit status: 1
  |
  = note:  "cc" "-Wl,--version-script=/tmp/rustc4uYbTQ/list" "-Wl,--no-undefined-version" "-m64" "/tmp/rustc4uYbTQ/symbols.o" "<1 object files omitted>" "/tmp/rustc4uYbTQ/rmeta.o" "<1 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/deps/{librustc_driver_impl-31b30145342b9cbb,libctrlc-4dbf62bdaf7c6e0b,libnix-f1304dc689ed0369,librustc_log-c691a733078fcbab,libtracing_tree-2057a4a4e6426b76,libtracing_log-b98da433aede5365,libnu_ansi_term-ef2e53cc3d22977e,libtracing_subscriber-7d4262429ad5302d,libnu_ansi_term-cbf6f68229bedf7d,liboverload-34d4ca544c013b4d,libsharded_slab-018808f565b0bcfc,liblazy_static-5137b28ade14797e,libmatchers-b044d822cee44ef3,libregex_automata-5859d2e13784b3f5,libregex_syntax-0372d545e91673ab,libthread_local-4877b4abbc04dbc1,libjiff-e4eeb7ccd9e31ed3,librustc_public-d2bbbdb248b5aa04,librustc_public_bridge-065d3c23b052ba7b,librustc_interface-6dafbb631884d317,librustc_codegen_llvm-8b36acc35c4f9553,librustc_llvm-a4a8b934c8ff0a3e,librustc_sanitizers-5d09ed83835a408e,librustc_hir_typeck-3738b4553586b21e,librustc_hir_analysis-4bca2c28c379a5a0,librustc_monomorphize-5e56bde50008ad43,librustc_mir_transform-83cf257ab6f43d3c,librustc_mir_build-544a3dbd0ec0cce1,librustc_pattern_analysis-5f95fc78203e20b7,librustc_borrowck-c5e510b5da0466f7,librustc_traits-b3c8eb876e524619,librustc_const_eval-c6fddb39d819f190,librustc_mir_dataflow-25bf77cdfd042dbf,librustc_builtin_macros-2575ff14d4baad3c,librustc_resolve-1aee6f32aadb99f4,libpulldown_cmark-9d2b27ef3bf3b94b,libunicase-0879c2aa23e1bac6,libpulldown_cmark_escape-2c0856ea1ef7dba4,librustc_passes-b25096a8807e4055,librustc_ast_lowering-e24704f3b33f0716,librustc_privacy-2778b33065eb419f,librustc_ty_utils-136aa7d08893ee8f,librustc_lint-7bd7ed88a8ccb260,libunicode_security-4f4a0c20eacc133a,libunicode_script-4efeee9822dfb721,librustc_query_impl-38d9c5e17d579999,librustc_codegen_ssa-b963815eea8793f7,libwasm_encoder-4e7fa34b0fd55733,libleb128-28247dbe6c573ca2,libthorin-aa5859cf75e8f8ab,libgimli-ba185437e6bdb530,libfallible_iterator-e87b8c565c8aac0c,libobject-a9184f8be9e67a12,libruzstd-140c5acb2a567d68,libtwox_hash-ac78c258b47522eb,librand-f7e65b0b3b903f5e,librand_chacha-64984855f74f30a4,librand_core-f3be480ad169c597,libgetrandom-8abe366ecfd45540,libstatic_assertions-e528c77b7dcf1617,libflate2-3cde38187dcc81fd,libminiz_oxide-e7c88279f3395798,libadler2-e1d77b079f1f8f64,libbstr-00f4147594a4ba3a,librustc_trait_selection-4b225a8ceeda5570,librustc_next_trait_solver-5445506e4e1e7818,librustc_parse_format-4b6edf32d7b948c6,librustc_transmute-6c12bb88054115d2,librustc_infer-2e834285ebeee425,librustc_symbol_mangling-93e1c3352485b8a8,librustc_demangle-deee865e1e0c92a6,libpunycode-7a1666589f5bdf29,libpathdiff-951997651703c097,libregex-97ca634e28eb93fe,libcc-a60991787dcc6ebd,libshlex-2a76203191d512e3,libar_archive_writer-d310eaba3585fecc,librustc_metadata-b3b6e63901aef98e,liblibloading-66c332feae6dba6d,librustc_incremental-40d0219111b712e0,librustc_expand-174437c70cf2ac9c,librustc_ast_passes-3ac40297093d22eb,librustc_proc_macro-a1686d5091dc7cd6,librustc_attr_parsing-dc17def0c3af428f,librustc_parse-bf0823e0f82ab1d5,libunicode_normalization-677dd027fc8ed67b,libtinyvec-c1ba67a271adac13,libtinyvec_macros-ee84fe3c9d673414,librustc_middle-41fd5fff88c08834,librustc_apfloat-150f9a0c79c8e18f,libgsgdt-c085536e62d7f392,libpolonius_engine-902c79f48e87e28e,libdatafrog-6dd5ae6cab76bebc,librustc_query_system-af3a9bbeb1b304f0,librustc_type_ir-03d9cdc41449cb20,librustc_session-9992f104a90940a8,libgetopts-29c548050820f89c,librustc_feature-c0ff823e34d2a656,librustc_hir_pretty-7073e9838504f7e5,librustc_errors-d704b70b3040e828,libtermize-90ba35512c1b9c99,librustc_error_codes-8b9c26a02dcaba1f,libannotate_snippets-12141ed425b42072,libanstyle-578c03cf4a1474a8,libtermcolor-d852e14248f052a1,librustc_lint_defs-21762156e4c9bd48,librustc_hir-b8384dc338065519,libodht-d100fc82709055cd,librustc_hir_id-59be35e767d5220d,librustc_target-26ef690ecc2b0eec,libserde_path_to_error-9ec23540d625a4a1,libschemars-7afffbfc6dfde84d,libdyn_clone-db5e0dd4aca75516,libref_cast-aeb6c87e5299ff5f,libobject-ba5c18e879466ca9,libcrc32fast-23daf039c0edad02,libwasmparser-69c60788164d4631,librustc_fs_util-261d104f8f98e1bb,libserde_json-b34ca3337fa88ea7,libryu-943951a9e9af3e64,libserde-6cf7280e98e27d2b,librustc_abi-6cb61635524bc3ef,librand_xoshiro-f58ff0d1f72f58bf,librustc_error_messages-59111ac1c59b904e,librustc_baked_icu_data-733e78842a2f61cf,libicu_list-fb8a64fb09221210,libregex_automata-46c4cafce2630d0a,libaho_corasick-5df1c405cceee49f,libregex_syntax-7af81e29d0de24fd,libicu_locale-55d301930ec8676d,libicu_locale_data-f75c104650fb01c1,libicu_collections-0d07cc4978d73789,libpotential_utf-fbf2e54353f7ce11,libicu_provider-584287a77045f7aa,libzerotrie-ea581373a758cc5a,libicu_locale_core-a2a20552a2dbfe03,libwriteable-42b69e787eed32b6,liblitemap-c77caa8b28f84cc0,librustc_ast_pretty-7176252010bd7e51,librustc_lexer-5705b7180dc01c9b,libunicode_xid-67000dab8d406b29,libunicode_properties-c0304acb875303f4,libitertools-e64a8365ea9c3f64,libfluent_bundle-5ce15693afbea942,libfluent_langneg-31d42e1467cd11e6,libintl_pluralrules-12ccba9a1c8a8919,libself_cell-19ba66245a931a4d,libintl_memoizer-80bfb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"<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,libcfg_if-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lrt" "-ldl" "-lm" "-lstdc++" "-ldl" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustc4uYbTQ/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/psm-d87e9a4f66bb2cd4/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/blake3-1eb924185bfc293b/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/rustc_llvm-1a6991de52bb9416/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/lib" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_driver-88244ff4aeead202.so" "-shared" "-Wl,-soname=librustc_driver-88244ff4aeead202.so" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-nodefaultlibs" "-Wl,-z,origin" "-Wl,-rpath,$ORIGIN/../lib"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
          Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
          0  rust-lld       0x00005599aea6acf0
          1  rust-lld       0x00005599aea6799f
          2  rust-lld       0x00005599aea67af2
          3  libc.so.6      0x00007f7f93d4a520
          4  libc.so.6      0x00007f7f93ea8a05
          5  rust-lld       0x00005599aec66e2c
          6  rust-lld       0x00005599aeca0662
          7  rust-lld       0x00005599b3a5880a
          8  rust-lld       0x00005599b3a590c1
          9  libstdc++.so.6 0x00007f7f94114253
          10 libc.so.6      0x00007f7f93d9cac3
          11 libc.so.6      0x00007f7f93e2e8c0
          collect2: fatal error: ld terminated with signal 7 [Bus error], core dumped
          compilation terminated.
          

[RUSTC-TIMING] rustc_driver test:false 5.294
error: could not compile `rustc_driver` (lib) due to 1 previous error

[bors]

💔 Test failed - checks-actions

[cuviper]

Well 3-in-a-row is pretty clearly busted -- but this time the message makes it clear that ld is really rust-lld, so this could be related to the LLVM upgrade somehow.

cc @rust-lang/wg-llvm