[INFO] fetching crate x-cov 0.1.0...
[INFO] testing x-cov-0.1.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate x-cov 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate x-cov 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate x-cov 0.1.0
[INFO] tweaked toml for crates.io crate x-cov 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate x-cov 0.1.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate x-cov 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7
[INFO] running `Command { std: "docker" "start" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling x-cov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling x-cov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> tests/ffi_equivalence.rs:640:13
[INFO] [stdout]     |
[INFO] [stdout] 640 |     let _ = unsafe { x_cov::capture_coverage(&mut buf) };
[INFO] [stdout]     |             ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/release/deps/rustcPlXMrU/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*,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-*}.rlib" "/opt/rustwide/target/release/deps/libportable_atomic-04ddcd954473bc4b.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/release/deps/rustcPlXMrU/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/release/deps/x_cov-46d43ec47df48977" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-Wl,--strip-debug" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: undefined symbol: __start___llvm_prf_data
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_data
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_cnts
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_cnts
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_bits
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_bits
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_names
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_names
[INFO] [stdout]           >>> referenced by x_cov.6135284f4a45f10e-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/x_cov-46d43ec47df48977.x_cov.6135284f4a45f10e-cgu.0.rcgu.o:(x_cov::merge::check_compatibility)
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x-cov` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note:  "cc" "-m64" "/opt/rustwide/target/release/deps/rustc9Pneue/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libtest-*,libgetopts-*,librustc_std_workspace_std-*}.rlib" "/opt/rustwide/target/release/deps/{libx_cov-787a42e7592928c6,libportable_atomic-04ddcd954473bc4b}.rlib" "<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" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/opt/rustwide/target/release/deps/rustc9Pneue/raw-dylibs" "-B<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/bin/gcc-ld" "-fuse-ld=lld" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/release/deps/ffi_equivalence-8ac587aca68f64d3" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-Wl,--strip-debug" "-nodefaultlibs"
[INFO] [stdout]   = note: some arguments are omitted. use `--verbose` to show all linker arguments
[INFO] [stdout]   = note: rust-lld: error: undefined symbol: __stop___llvm_prf_data
[INFO] [stdout]           >>> referenced by ffi_equivalence.d906a493b5dfc72f-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/ffi_equivalence-8ac587aca68f64d3.ffi_equivalence.d906a493b5dfc72f-cgu.0.rcgu.o:(<ffi_equivalence::empty_sections_mean_coverage_disabled::{closure#0} as core::ops::function::FnOnce<()>>::call_once)
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::reset_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 7 more times
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_data
[INFO] [stdout]           >>> referenced by ffi_equivalence.d906a493b5dfc72f-cgu.0
[INFO] [stdout]           >>>               /opt/rustwide/target/release/deps/ffi_equivalence-8ac587aca68f64d3.ffi_equivalence.d906a493b5dfc72f-cgu.0.rcgu.o:(<ffi_equivalence::empty_sections_mean_coverage_disabled::{closure#0} as core::ops::function::FnOnce<()>>::call_once)
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::reset_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::reset_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 8 more times
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_cnts
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 17 more times
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_bits
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 10 more times
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_cnts
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::reset_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge::check_compatibility) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 6 more times
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_bits
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::reset_coverage) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge::check_compatibility) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::buffer::get_size_for_buffer) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 3 more times
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_vnds
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::value::instrument_target_value) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(__llvm_profile_end_vnodes) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_vnds
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::value::instrument_target_value) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(__llvm_profile_begin_vnodes) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __stop___llvm_prf_names
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge::check_compatibility) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::buffer::get_size_for_buffer) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 3 more times
[INFO] [stdout]           
[INFO] [stdout]           rust-lld: error: undefined symbol: __start___llvm_prf_names
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::module_signature) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::merge::check_compatibility) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced by x_cov.309bb1b052a7f46c-cgu.0
[INFO] [stdout]           >>>               x_cov-787a42e7592928c6.x_cov.309bb1b052a7f46c-cgu.0.rcgu.o:(x_cov::buffer::get_size_for_buffer) in archive /opt/rustwide/target/release/deps/libx_cov-787a42e7592928c6.rlib
[INFO] [stdout]           >>> referenced 3 more times
[INFO] [stdout]           >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `x-cov` (test "ffi_equivalence") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7", kill_on_drop: false }`
[INFO] [stdout] 05f6872ea3b96070bcb0951f437bc07579688e75162e92ad6fa29d74ad2373d7
