[INFO] fetching crate promptly 0.3.1...
[INFO] building promptly-0.3.1 against try#434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275 for pr-101591
[INFO] extracting crate promptly 0.3.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate promptly 0.3.1 on toolchain 434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate promptly 0.3.1
[INFO] finished tweaking crates.io crate promptly 0.3.1
[INFO] tweaked toml for crates.io crate promptly 0.3.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate promptly 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e15206ccaecf874ced376fccd050b28b76cca32f86a7d816352ec48a93c8cc0f
[INFO] running `Command { std: "docker" "start" "-a" "e15206ccaecf874ced376fccd050b28b76cca32f86a7d816352ec48a93c8cc0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e15206ccaecf874ced376fccd050b28b76cca32f86a7d816352ec48a93c8cc0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e15206ccaecf874ced376fccd050b28b76cca32f86a7d816352ec48a93c8cc0f", kill_on_drop: false }`
[INFO] [stdout] e15206ccaecf874ced376fccd050b28b76cca32f86a7d816352ec48a93c8cc0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef386797c0d639f59676c00c5d6a29fec4326be4409cf8499588613b150372b2
[INFO] running `Command { std: "docker" "start" "-a" "ef386797c0d639f59676c00c5d6a29fec4326be4409cf8499588613b150372b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling io-lifetimes v0.6.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling rustix v0.34.8
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling linux-raw-sys v0.0.46
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.126`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-11347ee5380a2f37/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-0.2.126/build.rs:9:63
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55bb50d6f770 - std::backtrace_rs::backtrace::libunwind::trace::h1a33810611ce8d61
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x55bb50d6f770 - std::backtrace_rs::backtrace::trace_unsynchronized::h4a53559f1c05e6dd
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55bb50d6f770 - std::sys_common::backtrace::_print_fmt::hbeb6239bb320c748
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stderr]      3:     0x55bb50d6f770 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7fdb4e85ba340940
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stderr]      4:     0x55bb50d8cafe - core::fmt::write::h69f72efb5c17b4ab
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/fmt/mod.rs:1202:17
[INFO] [stderr]      5:     0x55bb50d6c9f5 - std::io::Write::write_fmt::h844fad8a1ef3a2e8
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/io/mod.rs:1679:15
[INFO] [stderr]      6:     0x55bb50d70df3 - std::sys_common::backtrace::_print::ha914f3096bed0a7c
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stderr]      7:     0x55bb50d70df3 - std::sys_common::backtrace::print::hf7ca71f4e06841a8
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stderr]      8:     0x55bb50d70df3 - std::panicking::default_hook::{{closure}}::h6be03a231a70c800
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:295:22
[INFO] [stderr]      9:     0x55bb50d70adf - std::panicking::default_hook::h8f58539bc13ee1ad
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:314:9
[INFO] [stderr]     10:     0x55bb50d7149a - std::panicking::rust_panic_with_hook::h7a2c121217c9432d
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:698:17
[INFO] [stderr]     11:     0x55bb50d71397 - std::panicking::begin_panic_handler::{{closure}}::h1ca9e1d42243c666
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:588:13
[INFO] [stderr]     12:     0x55bb50d6fc1c - std::sys_common::backtrace::__rust_end_short_backtrace::h79298f0d734af14a
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stderr]     13:     0x55bb50d710b2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:584:5
[INFO] [stderr]     14:     0x55bb50d48a93 - core::panicking::panic_fmt::h434b303c3aba650c
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/panicking.rs:142:14
[INFO] [stderr]     15:     0x55bb50d8bda1 - core::panicking::panic_display::hb3ad875e119462f0
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/panicking.rs:72:5
[INFO] [stderr]     16:     0x55bb50d8bd4b - core::panicking::panic_str::ha6edb658b866df65
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/panicking.rs:56:5
[INFO] [stderr]     17:     0x55bb50d48906 - core::option::expect_failed::heb591cc2186ba0bd
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/option.rs:1880:5
[INFO] [stderr]     18:     0x55bb50d4ab52 - core::option::Option<T>::expect::h7f6a61454fb69873
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/option.rs:738:21
[INFO] [stderr]     19:     0x55bb50d4e664 - build_script_build::main::hdae49804e096c34e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.126/build.rs:9:41
[INFO] [stderr]     20:     0x55bb50d52a7b - core::ops::function::FnOnce::call_once::h138917a526099759
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/ops/function.rs:248:5
[INFO] [stderr]     21:     0x55bb50d5282e - std::sys_common::backtrace::__rust_begin_short_backtrace::h29569963222713b7
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stderr]     22:     0x55bb50d4bb41 - std::rt::lang_start::{{closure}}::h559585c13136f4d3
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55bb50d6a12f - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h0aba527962058f8d
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/core/src/ops/function.rs:280:13
[INFO] [stderr]     24:     0x55bb50d6a12f - std::panicking::try::do_call::ha4178ef55820a4f8
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:492:40
[INFO] [stderr]     25:     0x55bb50d6a12f - std::panicking::try::h4edf4589bde3bb09
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:456:19
[INFO] [stderr]     26:     0x55bb50d6a12f - std::panic::catch_unwind::h0951c1592c920aa0
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55bb50d6a12f - std::rt::lang_start_internal::{{closure}}::h765333e76f22cefc
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55bb50d6a12f - std::panicking::try::do_call::hcd1370fdda710240
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:492:40
[INFO] [stderr]     29:     0x55bb50d6a12f - std::panicking::try::h477fa91d0d1d6fe2
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panicking.rs:456:19
[INFO] [stderr]     30:     0x55bb50d6a12f - std::panic::catch_unwind::h409f8207d3ed176c
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55bb50d6a12f - std::rt::lang_start_internal::h9d73c5ab21cad85e
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55bb50d4bb1a - std::rt::lang_start::h1d3d491d63b2c541
[INFO] [stderr]                                  at /rustc/434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55bb50d4fdc1 - main
[INFO] [stderr]     34:     0x7f6e9d549083 - __libc_start_main
[INFO] [stderr]     35:     0x55bb50d48c6e - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ef386797c0d639f59676c00c5d6a29fec4326be4409cf8499588613b150372b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef386797c0d639f59676c00c5d6a29fec4326be4409cf8499588613b150372b2", kill_on_drop: false }`
[INFO] [stdout] ef386797c0d639f59676c00c5d6a29fec4326be4409cf8499588613b150372b2