[INFO] fetching crate promising-future 0.2.4...
[INFO] checking promising-future-0.2.4 against try#b2686d78d0034bb3435b348d5a63910b074a1990 for pr-104429
[INFO] extracting crate promising-future 0.2.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate promising-future 0.2.4 on toolchain b2686d78d0034bb3435b348d5a63910b074a1990
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2686d78d0034bb3435b348d5a63910b074a1990" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate promising-future 0.2.4
[INFO] finished tweaking crates.io crate promising-future 0.2.4
[INFO] tweaked toml for crates.io crate promising-future 0.2.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2686d78d0034bb3435b348d5a63910b074a1990" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2686d78d0034bb3435b348d5a63910b074a1990" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+b2686d78d0034bb3435b348d5a63910b074a1990" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22020469b083c082bd1bf3c9ddb8342501bf465c6ec05b95ff54cd9c7d1dbcd6
[INFO] running `Command { std: "docker" "start" "-a" "22020469b083c082bd1bf3c9ddb8342501bf465c6ec05b95ff54cd9c7d1dbcd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22020469b083c082bd1bf3c9ddb8342501bf465c6ec05b95ff54cd9c7d1dbcd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22020469b083c082bd1bf3c9ddb8342501bf465c6ec05b95ff54cd9c7d1dbcd6", kill_on_drop: false }`
[INFO] [stdout] 22020469b083c082bd1bf3c9ddb8342501bf465c6ec05b95ff54cd9c7d1dbcd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+b2686d78d0034bb3435b348d5a63910b074a1990" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b26ca02d6dbdff875cd266e6c6743fd0f0d1d6aad17156123acdf3b31eef476c
[INFO] running `Command { std: "docker" "start" "-a" "b26ca02d6dbdff875cd266e6c6743fd0f0d1d6aad17156123acdf3b31eef476c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.137`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-de9ae1dce6a72901/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=build.rs
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Failed to get rustc version', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.137/build.rs:9:63
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55b45ec85c00 - std::backtrace_rs::backtrace::libunwind::trace::h697c7b09a35fd9c2
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stderr]      1:     0x55b45ec85c00 - std::backtrace_rs::backtrace::trace_unsynchronized::h0f9dabaaf341467a
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55b45ec85c00 - std::sys_common::backtrace::_print_fmt::h3a983b2b9bf8a184
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x55b45ec85c00 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h2a57cade56540b8d
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55b45eca2d6e - core::fmt::write::h9e8c3e5ef720c855
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/fmt/mod.rs:1208:17
[INFO] [stderr]      5:     0x55b45ec832b5 - std::io::Write::write_fmt::hf236d8f17b638fa4
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x55b45ec859c5 - std::sys_common::backtrace::_print::h13a98bc2378382af
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x55b45ec859c5 - std::sys_common::backtrace::print::h3a74f8bf46e6d814
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x55b45ec870af - std::panicking::default_hook::{{closure}}::hab16ceb8b4796878
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x55b45ec86dea - std::panicking::default_hook::h1d158f995d246015
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x55b45ec877ac - std::panicking::rust_panic_with_hook::h79ea22204f4f1b73
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x55b45ec87547 - std::panicking::begin_panic_handler::{{closure}}::haec8ef2463bbb388
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x55b45ec860ac - std::sys_common::backtrace::__rust_end_short_backtrace::hffb4ebe81bb3f460
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x55b45ec87262 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x55b45ec5f083 - core::panicking::panic_fmt::h409183b8b2cad10e
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/panicking.rs:65:14
[INFO] [stderr]     15:     0x55b45eca2011 - core::panicking::panic_display::h3995a55a781973ae
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/panicking.rs:138:5
[INFO] [stderr]     16:     0x55b45eca1fbb - core::panicking::panic_str::h79f26c8b77895973
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/panicking.rs:122:5
[INFO] [stderr]     17:     0x55b45ec5f046 - core::option::expect_failed::h5d9c611806c005f9
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x55b45ec69154 - core::option::Option<T>::expect::h9a9176deb013ed42
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x55b45ec642e4 - build_script_build::main::hf4f8ca5157547273
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.137/build.rs:9:41
[INFO] [stderr]     20:     0x55b45ec67ccb - core::ops::function::FnOnce::call_once::hd71e134515540647
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/ops/function.rs:507:5
[INFO] [stderr]     21:     0x55b45ec68a0e - std::sys_common::backtrace::__rust_begin_short_backtrace::h3ab11a0ac7ade09e
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x55b45ec616d1 - std::rt::lang_start::{{closure}}::hc2ecba234c186186
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55b45ec8060b - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7816459648f8cd47
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/core/src/ops/function.rs:606:13
[INFO] [stderr]     24:     0x55b45ec8060b - std::panicking::try::do_call::ha06667d7246f8905
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x55b45ec8060b - std::panicking::try::h4fe8cb986ad7e721
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x55b45ec8060b - std::panic::catch_unwind::hca02bfa70f8baa46
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55b45ec8060b - std::rt::lang_start_internal::{{closure}}::hd71054758cea57ce
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55b45ec8060b - std::panicking::try::do_call::h1e510e39fcfbcc82
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x55b45ec8060b - std::panicking::try::he2668b3b785f0e71
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x55b45ec8060b - std::panic::catch_unwind::h7bb8645ecbf538e0
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55b45ec8060b - std::rt::lang_start_internal::h7b7a19d6faf17d25
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55b45ec616aa - std::rt::lang_start::ha154099d828aeadd
[INFO] [stderr]                                  at /rustc/b2686d78d0034bb3435b348d5a63910b074a1990/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55b45ec65abe - main
[INFO] [stderr]     34:     0x7efe2c0d0083 - __libc_start_main
[INFO] [stderr]     35:     0x55b45ec5f3ce - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "b26ca02d6dbdff875cd266e6c6743fd0f0d1d6aad17156123acdf3b31eef476c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b26ca02d6dbdff875cd266e6c6743fd0f0d1d6aad17156123acdf3b31eef476c", kill_on_drop: false }`
[INFO] [stdout] b26ca02d6dbdff875cd266e6c6743fd0f0d1d6aad17156123acdf3b31eef476c