[INFO] cloning repository https://github.com/Yarn/button_timing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yarn/button_timing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYarn%2Fbutton_timing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYarn%2Fbutton_timing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a294379d59227e54a72e62eaecbd7d83529ccd9
[INFO] building Yarn/button_timing against try#14accda7ba2c586835d15379a621955d9f047371 for pr-103610
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYarn%2Fbutton_timing" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yarn/button_timing on toolchain 14accda7ba2c586835d15379a621955d9f047371
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+14accda7ba2c586835d15379a621955d9f047371" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yarn/button_timing
[INFO] finished tweaking git repo https://github.com/Yarn/button_timing
[INFO] tweaked toml for git repo https://github.com/Yarn/button_timing written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Yarn/button_timing already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+14accda7ba2c586835d15379a621955d9f047371" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+14accda7ba2c586835d15379a621955d9f047371" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bba074393cb1b07d1a171d095ce9eefb2a1576babf61482498536ba5b7c4a4a
[INFO] running `Command { std: "docker" "start" "-a" "7bba074393cb1b07d1a171d095ce9eefb2a1576babf61482498536ba5b7c4a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bba074393cb1b07d1a171d095ce9eefb2a1576babf61482498536ba5b7c4a4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bba074393cb1b07d1a171d095ce9eefb2a1576babf61482498536ba5b7c4a4a", kill_on_drop: false }`
[INFO] [stdout] 7bba074393cb1b07d1a171d095ce9eefb2a1576babf61482498536ba5b7c4a4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+14accda7ba2c586835d15379a621955d9f047371" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 882fa8592c6ff17adac4d009f5e024358dabba3507fcf5b394873c52b168df69
[INFO] running `Command { std: "docker" "start" "-a" "882fa8592c6ff17adac4d009f5e024358dabba3507fcf5b394873c52b168df69", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling smallvec v1.2.0
[INFO] [stderr]    Compiling arc-swap v0.4.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling lock_api v0.3.3
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.66`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-7aae3d1719debe87/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Failed to get rustc version', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.66/build.rs:7:31
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55f1ee2c33b0 - std::backtrace_rs::backtrace::libunwind::trace::h7633eb641459aaeb
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x55f1ee2c33b0 - std::backtrace_rs::backtrace::trace_unsynchronized::he26627fdd4907ad8
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55f1ee2c33b0 - std::sys_common::backtrace::_print_fmt::h7469132437f98c76
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x55f1ee2c33b0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h251859263554ada4
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55f1ee2e039e - core::fmt::write::hc10398849ebfa2c4
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/fmt/mod.rs:1209:17
[INFO] [stderr]      5:     0x55f1ee2c0965 - std::io::Write::write_fmt::h379fea3228f07ce0
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x55f1ee2c3175 - std::sys_common::backtrace::_print::hddc08f10d993470f
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x55f1ee2c3175 - std::sys_common::backtrace::print::h9971de2c9fdfbc98
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x55f1ee2c487f - std::panicking::default_hook::{{closure}}::h2b011782b6ba69da
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x55f1ee2c45ba - std::panicking::default_hook::hcb801ed1969610aa
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x55f1ee2c4f78 - std::panicking::rust_panic_with_hook::hd24ee2ee98b62fd0
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x55f1ee2c4d17 - std::panicking::begin_panic_handler::{{closure}}::h4128f55dcad95665
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x55f1ee2c385c - std::sys_common::backtrace::__rust_end_short_backtrace::hddedce0aa92e3938
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x55f1ee2c4a32 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x55f1ee29d083 - core::panicking::panic_fmt::h3331ce9446971266
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/panicking.rs:65:14
[INFO] [stderr]     15:     0x55f1ee2df641 - core::panicking::panic_display::h8da214595d9c651c
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/panicking.rs:139:5
[INFO] [stderr]     16:     0x55f1ee2df5eb - core::panicking::panic_str::hdf71a800693243e9
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/panicking.rs:123:5
[INFO] [stderr]     17:     0x55f1ee29d046 - core::option::expect_failed::h5e66c23b1347b659
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x55f1ee2a6de2 - core::option::Option<T>::expect::h9d6b99dab0330f1b
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x55f1ee2a3a87 - build_script_build::main::h8c9ffe080616eb62
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.66/build.rs:7:9
[INFO] [stderr]     20:     0x55f1ee2a5aab - core::ops::function::FnOnce::call_once::hb97591a87263f501
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/ops/function.rs:251:5
[INFO] [stderr]     21:     0x55f1ee2a67be - std::sys_common::backtrace::__rust_begin_short_backtrace::h6f0f51d471958313
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x55f1ee29f6c1 - std::rt::lang_start::{{closure}}::h7939833e9e1f10ae
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55f1ee2bddcb - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h96047c53f25c9ab9
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/core/src/ops/function.rs:286:13
[INFO] [stderr]     24:     0x55f1ee2bddcb - std::panicking::try::do_call::hd93cc5ad7d7f3960
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x55f1ee2bddcb - std::panicking::try::h3f8a0aec10bf973e
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x55f1ee2bddcb - std::panic::catch_unwind::hf6db73add5b88e9f
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55f1ee2bddcb - std::rt::lang_start_internal::{{closure}}::h298464fec6b50def
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55f1ee2bddcb - std::panicking::try::do_call::h23d2246eb2e6e555
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x55f1ee2bddcb - std::panicking::try::h06faa2d99f64be23
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x55f1ee2bddcb - std::panic::catch_unwind::hc70f54f4b97a18c9
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55f1ee2bddcb - std::rt::lang_start_internal::hc6c949349c843066
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55f1ee29f69a - std::rt::lang_start::h47f4d7a821a8d1a1
[INFO] [stderr]                                  at /rustc/14accda7ba2c586835d15379a621955d9f047371/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55f1ee2a4f2e - main
[INFO] [stderr]     34:     0x7f84703b5083 - __libc_start_main
[INFO] [stderr]     35:     0x55f1ee29d3ce - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "882fa8592c6ff17adac4d009f5e024358dabba3507fcf5b394873c52b168df69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882fa8592c6ff17adac4d009f5e024358dabba3507fcf5b394873c52b168df69", kill_on_drop: false }`
[INFO] [stdout] 882fa8592c6ff17adac4d009f5e024358dabba3507fcf5b394873c52b168df69