profiler_builtins compiled failed when I try to get the test coverage of std\core\alloc

Summary

Thanks for reading or replying.
I hope to get test coverage for std\core\alloc.
Currently I have tried the following method:

export RUSTFLAGS_NOT_BOOTSTRAP="-C instrument-coverage"

bootstrap.toml:

build.profiler = true

profiler_builtins compiled failed:

Compiling profiler_builtins v0.0.0 (/usr/local/xxxx/rust/library/profiler_builtins)
     Running `CARGO=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo CARGO_CRATE_NAME=core CARGO_MANIFEST_DIR=/usr/local/xxxx/rust/library/core CARGO_MANIFEST_PATH=/usr/local/xxxx/rust/library/core/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='The Rust Core Library' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='MIT OR Apache-2.0' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=core CARGO_PKG_README='' CARGO_PKG_REPOSITORY='https://github.com/rust-lang/rust.git' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps /usr/local/xxxx/rust/build/bootstrap/debug/rustc /usr/local/xxxx/rust/build/bootstrap/debug/rustc --crate-name core --edition=2024 library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=175 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --warn=unexpected_cfgs --check-cfg 'cfg(target_arch, values("loongarch32"))' --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "debug_typeid", "optimize_for_size", "panic_immediate_abort"))' -C metadata=5efc210677be9bcf -C extra-filename=-31604dc462678efe --out-dir /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps -C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo`
     Running `CARGO=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo CARGO_CRATE_NAME=profiler_builtins CARGO_MANIFEST_DIR=/usr/local/xxxx/rust/library/profiler_builtins CARGO_MANIFEST_PATH=/usr/local/xxxx/rust/library/profiler_builtins/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=profiler_builtins CARGO_PKG_README='' CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps OUT_DIR=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/profiler_builtins-61fd907b55223bac/out /usr/local/xxxx/rust/build/bootstrap/debug/rustc /usr/local/xxxx/rust/build/bootstrap/debug/rustc --crate-name profiler_builtins --edition=2024 library/profiler_builtins/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=175 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=026dc6690de98996 -C extra-filename=-24e4fd21d230add6 --out-dir /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps -C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo -L native=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/profiler_builtins-61fd907b55223bac/out -l static=profiler-rt`
error[E0463]: can't find crate for `profiler_builtins`
  |
  = note: the compiler may have been built without the profiler runtime

For more information about this error, try `rustc --explain E0463`.
    Building [=======>                   ] 12/40: profiler_builtins, core
Did not run successfully: exit status: 1
LD_LIBRARY_PATH="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/lib:/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "profiler_builtins" "--edition=2024" "library/profiler_builtins/src/lib.rs" "--error-format=json" "--json=diagnostic-rendered-ansi,artifacts,future-incompat" "--diagnostic-width=175" "--crate-type" "lib" "--emit=dep-info,metadata,link" "-C" "opt-level=3" "-C" "embed-bitcode=no" "--check-cfg" "cfg(docsrs,test)" "--check-cfg" "cfg(feature, values())" "-C" "metadata=026dc6690de98996" "-C" "extra-filename=-24e4fd21d230add6" "--out-dir" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "--target" "x86_64-unknown-linux-gnu" "-L" "dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "-C" "instrument-coverage" "-Cprefer-dynamic" "-Csymbol-mangling-version=v0" "--check-cfg=cfg(feature,values(any()))" "-Zunstable-options" "-Zmacro-backtrace" "-Csplit-debuginfo=off" "-Cprefer-dynamic" "-Zinline-mir" "-Zinline-mir-preserve-debug" "-Zmir_strip_debuginfo=locals-in-tiny-functions" "-Clink-args=-Wl,-z,origin" "-Clink-args=-Wl,-rpath,$ORIGIN/../lib" "-Alinker-messages" "-Cembed-bitcode=yes" "-Zunstable-options" "-Cforce-frame-pointers=non-leaf" "-Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/nightly/\")" "-Z" "binary-dep-depinfo" "-L" "native=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/profiler_builtins-61fd907b55223bac/out" "-l" "static=profiler-rt" "-Wrust_2018_idioms" "-Wunused_lifetimes" "-Dwarnings" "--sysroot" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1" "-Z" "force-unstable-if-unmarked"
-------------
warning: profiler_builtins@0.0.0: In file included from /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt/lib/profile/InstrProfiling.h:12,
warning: profiler_builtins@0.0.0:                  from /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt/lib/profile/InstrProfilingFile.c:34:
warning: profiler_builtins@0.0.0: /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt/lib/profile/InstrProfilingFile.c: In function ‘doProfileMerging’:
warning: profiler_builtins@0.0.0: /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt/lib/profile/InstrProfilingPort.h:33:37: warning: ignoring return value of ‘ftruncate’, declared with attribute warn_unused_result [-Wunused-result]
warning: profiler_builtins@0.0.0:    33 | #define COMPILER_RT_FTRUNCATE(f, l) ftruncate(fileno(f), l)
warning: profiler_builtins@0.0.0:       |                                     ^~~~~~~~~~~~~~~~~~~~~~~
warning: profiler_builtins@0.0.0: /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt/lib/profile/InstrProfilingFile.c:479:9: note: in expansion of macro ‘COMPILER_RT_FTRUNCATE’
warning: profiler_builtins@0.0.0:   479 |   (void)COMPILER_RT_FTRUNCATE(ProfileFile,
warning: profiler_builtins@0.0.0:       |         ^~~~~~~~~~~~~~~~~~~~~
error: could not compile `profiler_builtins` (lib) due to 1 previous error

Caused by:
  process didn't exit successfully: `CARGO=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo CARGO_CRATE_NAME=profiler_builtins CARGO_MANIFEST_DIR=/usr/local/xxxx/rust/library/profiler_builtins CARGO_MANIFEST_PATH=/usr/local/xxxx/rust/library/profiler_builtins/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=profiler_builtins CARGO_PKG_README='' CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps OUT_DIR=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/profiler_builtins-61fd907b55223bac/out /usr/local/xxxx/rust/build/bootstrap/debug/rustc /usr/local/xxxx/rust/build/bootstrap/debug/rustc --crate-name profiler_builtins --edition=2024 library/profiler_builtins/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=175 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=026dc6690de98996 -C extra-filename=-24e4fd21d230add6 --out-dir /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps -C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo -L native=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/profiler_builtins-61fd907b55223bac/out -l static=profiler-rt` (exit status: 1)
warning: build failed, waiting for other jobs to finish...
    Building [=======>                   ] 13/40: core
Did not run successfully: exit status: 1
LD_LIBRARY_PATH="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/lib:/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "core" "--edition=2024" "library/core/src/lib.rs" "--error-format=json" "--json=diagnostic-rendered-ansi,artifacts,future-incompat" "--diagnostic-width=175" "--crate-type" "lib" "--emit=dep-info,metadata,link" "-C" "opt-level=3" "-C" "embed-bitcode=no" "--warn=unexpected_cfgs" "--check-cfg" "cfg(target_arch, values(\"loongarch32\"))" "--check-cfg" "cfg(no_fp_fmt_parse)" "--check-cfg" "cfg(feature, values(any()))" "--check-cfg" "cfg(target_has_reliable_f16)" "--check-cfg" "cfg(target_has_reliable_f16_math)" "--check-cfg" "cfg(target_has_reliable_f128)" "--check-cfg" "cfg(target_has_reliable_f128_math)" "--check-cfg" "cfg(docsrs,test)" "--check-cfg" "cfg(feature, values(\"debug_refcell\", \"debug_typeid\", \"optimize_for_size\", \"panic_immediate_abort\"))" "-C" "metadata=5efc210677be9bcf" "-C" "extra-filename=-31604dc462678efe" "--out-dir" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "--target" "x86_64-unknown-linux-gnu" "-L" "dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "-C" "instrument-coverage" "-Cprefer-dynamic" "-Csymbol-mangling-version=v0" "--check-cfg=cfg(feature,values(any()))" "-Zunstable-options" "-Zmacro-backtrace" "-Csplit-debuginfo=off" "-Cprefer-dynamic" "-Zinline-mir" "-Zinline-mir-preserve-debug" "-Zmir_strip_debuginfo=locals-in-tiny-functions" "-Clink-args=-Wl,-z,origin" "-Clink-args=-Wl,-rpath,$ORIGIN/../lib" "-Alinker-messages" "-Cembed-bitcode=yes" "-Zunstable-options" "-Cforce-frame-pointers=non-leaf" "-Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/nightly/\")" "-Z" "binary-dep-depinfo" "-Wrust_2018_idioms" "-Wunused_lifetimes" "-Dwarnings" "--sysroot" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1" "-Z" "force-unstable-if-unmarked"
-------------
error: could not compile `core` (lib) due to 1 previous error

Caused by:
  process didn't exit successfully: `CARGO=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo CARGO_CRATE_NAME=core CARGO_MANIFEST_DIR=/usr/local/xxxx/rust/library/core CARGO_MANIFEST_PATH=/usr/local/xxxx/rust/library/core/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='The Rust Core Library' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='MIT OR Apache-2.0' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=core CARGO_PKG_README='' CARGO_PKG_REPOSITORY='https://github.com/rust-lang/rust.git' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.0.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=0 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 CARGO_SBOM_PATH='' LD_LIBRARY_PATH=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps /usr/local/xxxx/rust/build/bootstrap/debug/rustc /usr/local/xxxx/rust/build/bootstrap/debug/rustc --crate-name core --edition=2024 library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=175 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --warn=unexpected_cfgs --check-cfg 'cfg(target_arch, values("loongarch32"))' --check-cfg 'cfg(no_fp_fmt_parse)' --check-cfg 'cfg(feature, values(any()))' --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("debug_refcell", "debug_typeid", "optimize_for_size", "panic_immediate_abort"))' -C metadata=5efc210677be9bcf -C extra-filename=-31604dc462678efe --out-dir /usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps -C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo` (exit status: 1)
command did not execute successfully: cd "/usr/local/xxxx/rust" && env -u MAKEFLAGS -u MFLAGS AR_x86_64_unknown_linux_gnu="ar" CARGO_INCREMENTAL="0" CARGO_LOG="cargo::core::compiler::fingerprint=info" CARGO_PROFILE_RELEASE_DEBUG="0" CARGO_PROFILE_RELEASE_DEBUG_ASSERTIONS="false" CARGO_PROFILE_RELEASE_OVERFLOW_CHECKS="false" CARGO_PROFILE_RELEASE_STRIP="false" CARGO_TARGET_DIR="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1-std" CC_x86_64_unknown_linux_gnu="cc" CFG_COMPILER_BUILD_TRIPLE="x86_64-unknown-linux-gnu" CFG_COMPILER_HOST_TRIPLE="x86_64-unknown-linux-gnu" CFG_RELEASE_CHANNEL="dev" CFLAGS_x86_64_unknown_linux_gnu="" CXXFLAGS_x86_64_unknown_linux_gnu="" CXX_x86_64_unknown_linux_gnu="c++" LIBC_CHECK_CFG="1" RANLIB_x86_64_unknown_linux_gnu="ar s" REAL_LIBRARY_PATH_VAR="LD_LIBRARY_PATH" RUSTBUILD_NATIVE_DIR="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/native" RUSTC="/usr/local/xxxx/rust/build/bootstrap/debug/rustc" RUSTC_BOOTSTRAP="1" RUSTC_BREAK_ON_ICE="1" RUSTC_ERROR_METADATA_DST="/usr/local/xxxx/rust/build/tmp/extended-error-metadata" RUSTC_FORCE_UNSTABLE="1" RUSTC_INSTALL_BINDIR="bin" RUSTC_LIBDIR="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/lib" RUSTC_LINK_STD_INTO_RUSTC_DRIVER="1" RUSTC_LINT_FLAGS="-Wrust_2018_idioms -Wunused_lifetimes -Dwarnings" RUSTC_REAL="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1/bin/rustc" RUSTC_SNAPSHOT="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/rustc" RUSTC_SNAPSHOT_LIBDIR="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/lib" RUSTC_STAGE="1" RUSTC_SYSROOT="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage1" RUSTC_VERBOSE="2" RUSTC_WRAPPER="/usr/local/xxxx/rust/build/bootstrap/debug/rustc" RUSTDOC="/usr/local/xxxx/rust/build/bootstrap/debug/rustdoc" RUSTDOCFLAGS="-C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 --check-cfg=cfg(feature,values(any())) -Zunstable-options -Dwarnings -Wrustdoc::invalid_codeblock_attributes --crate-version 1.90.0-dev -Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/nightly/\") -Zcrate-attr=warn(rust_2018_idioms)" RUSTDOC_REAL="/path/to/nowhere/rustdoc/not/required" RUSTFLAGS="-C instrument-coverage -Cprefer-dynamic -Csymbol-mangling-version=v0 --check-cfg=cfg(feature,values(any())) -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin -Clink-args=-Wl,-rpath,$ORIGIN/../lib -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf -Zcrate-attr=doc(html_root_url=\"https://doc.rust-lang.org/nightly/\")" RUST_COMPILER_RT_FOR_PROFILER="/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/ci-llvm/compiler-rt" RUST_TEST_THREADS="4" WINAPI_NO_BUNDLED_LIBRARIES="1" __CARGO_DEFAULT_LIB_METADATA="devstd1.90.0" "/usr/local/xxxx/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "4" "-Zroot-dir=/usr/local/xxxx/rust" "-v" "-v" "--release" "--features" "backtrace panic-unwind profiler" "--manifest-path" "/usr/local/xxxx/rust/library/sysroot/Cargo.toml" "-p" "alloc" "-p" "compiler_builtins" "-p" "core" "-p" "panic_abort" "-p" "panic_unwind" "-p" "proc_macro" "-p" "profiler_builtins" "-p" "std" "-p" "sysroot" "-p" "test" "-p" "unwind" "--message-format" "json-render-diagnostics"
expected success, got: exit status: 101
Traceback (most recent call last):
  File "./x.py", line 53, in <module>
    bootstrap.main()
  File "/usr/local/xxxx/rust/src/bootstrap/bootstrap.py", line 1372, in main
    bootstrap(args)
  File "/usr/local/xxxx/rust/src/bootstrap/bootstrap.py", line 1347, in bootstrap
    run(args, env=env, verbose=build.verbose, is_bootstrap=True)
  File "/usr/local/xxxx/rust/src/bootstrap/bootstrap.py", line 236, in run
    raise RuntimeError(err)
RuntimeError: failed to run: /usr/local/xxxx/rust/build/bootstrap/debug/bootstrap build --stage 1 -vv

Operating system

Ubuntu 20.04.1 LTS  x86_64

Reproduce the std/core/alloc coverage build using bootstrap.toml and RUSTFLAGS_NOT_BOOTSTRAP="-C instrument-coverage". Start with library/profiler_builtins/src/lib.rs and the profiler_builtins build output around E0463; done means profiler_builtins builds successfully and the requested coverage run can proceed.