[INFO] fetching crate qargparser 0.5.6...
[INFO] checking qargparser-0.5.6 against try#742889a08e10036dc30b8a7308f2a2a15b706883 for pr-103450-1
[INFO] extracting crate qargparser 0.5.6 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate qargparser 0.5.6 on toolchain 742889a08e10036dc30b8a7308f2a2a15b706883
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+742889a08e10036dc30b8a7308f2a2a15b706883" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qargparser 0.5.6
[INFO] finished tweaking crates.io crate qargparser 0.5.6
[INFO] tweaked toml for crates.io crate qargparser 0.5.6 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate qargparser 0.5.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+742889a08e10036dc30b8a7308f2a2a15b706883" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+742889a08e10036dc30b8a7308f2a2a15b706883" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33029fb2b51516e583faacfe5d5b6990b5d25626efbc4b3936465b91212bd6f8
[INFO] running `Command { std: "docker" "start" "-a" "33029fb2b51516e583faacfe5d5b6990b5d25626efbc4b3936465b91212bd6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33029fb2b51516e583faacfe5d5b6990b5d25626efbc4b3936465b91212bd6f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33029fb2b51516e583faacfe5d5b6990b5d25626efbc4b3936465b91212bd6f8", kill_on_drop: false }`
[INFO] [stdout] 33029fb2b51516e583faacfe5d5b6990b5d25626efbc4b3936465b91212bd6f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+742889a08e10036dc30b8a7308f2a2a15b706883" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 354087aa88b9c25b56d5356fa294783a611f9a8298fb6fb0bb33467b1f6c6c54
[INFO] running `Command { std: "docker" "start" "-a" "354087aa88b9c25b56d5356fa294783a611f9a8298fb6fb0bb33467b1f6c6c54", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.71`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-c47dac998da3d0a1/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-0.2.71/build.rs:7:31
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55e89d9f13b0 - std::backtrace_rs::backtrace::libunwind::trace::h0cfde6bcd0e9218b
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x55e89d9f13b0 - std::backtrace_rs::backtrace::trace_unsynchronized::h73414317b67b9258
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55e89d9f13b0 - std::sys_common::backtrace::_print_fmt::hc72856056229ba99
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x55e89d9f13b0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9bcc505be023bcd9
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55e89da0e39e - core::fmt::write::hbbd758e71b4c78c5
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/fmt/mod.rs:1209:17
[INFO] [stderr]      5:     0x55e89d9eea65 - std::io::Write::write_fmt::hb0acfa68241718b6
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x55e89d9f1175 - std::sys_common::backtrace::_print::h62204460ef6db810
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x55e89d9f1175 - std::sys_common::backtrace::print::h23fdf6726ef1c6e2
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x55e89d9f287f - std::panicking::default_hook::{{closure}}::h7043b9f3773e01d7
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x55e89d9f25ba - std::panicking::default_hook::hb0018265d6ff17ae
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x55e89d9f2f78 - std::panicking::rust_panic_with_hook::h96053eff6f8faa55
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x55e89d9f2d17 - std::panicking::begin_panic_handler::{{closure}}::hce407c1c2ff6f91f
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x55e89d9f185c - std::sys_common::backtrace::__rust_end_short_backtrace::h02aa76146c054f19
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x55e89d9f2a32 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x55e89d9cb083 - core::panicking::panic_fmt::h2ab19d77581e7904
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/panicking.rs:65:14
[INFO] [stderr]     15:     0x55e89da0d641 - core::panicking::panic_display::h94f12c889dad2e7f
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/panicking.rs:139:5
[INFO] [stderr]     16:     0x55e89da0d5eb - core::panicking::panic_str::h73803a165ff54ccb
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/panicking.rs:123:5
[INFO] [stderr]     17:     0x55e89d9cb046 - core::option::expect_failed::h8daa48383042e80a
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x55e89d9d4de2 - core::option::Option<T>::expect::h5b6fb70baf44e49c
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x55e89d9d1a87 - build_script_build::main::h157f44c1ed365429
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.71/build.rs:7:9
[INFO] [stderr]     20:     0x55e89d9d3aab - core::ops::function::FnOnce::call_once::h886e892df1de9f75
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/ops/function.rs:251:5
[INFO] [stderr]     21:     0x55e89d9d47be - std::sys_common::backtrace::__rust_begin_short_backtrace::h0b3efec2e98a8838
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x55e89d9cd6c1 - std::rt::lang_start::{{closure}}::h5e8121982db1f27d
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55e89d9ebdcb - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h5d47dd4b19bce991
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/core/src/ops/function.rs:286:13
[INFO] [stderr]     24:     0x55e89d9ebdcb - std::panicking::try::do_call::h12db108a75bff364
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x55e89d9ebdcb - std::panicking::try::hb313b71e6243e635
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x55e89d9ebdcb - std::panic::catch_unwind::hc8863488ba4869e0
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55e89d9ebdcb - std::rt::lang_start_internal::{{closure}}::h985017cd696ff8af
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55e89d9ebdcb - std::panicking::try::do_call::h0f7ad2cd832b0126
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x55e89d9ebdcb - std::panicking::try::h68f249420edfb7ca
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x55e89d9ebdcb - std::panic::catch_unwind::h7f32ea3d29c91351
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55e89d9ebdcb - std::rt::lang_start_internal::hcf55cd02fe214e16
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55e89d9cd69a - std::rt::lang_start::h5119fb25c84eed4c
[INFO] [stderr]                                  at /rustc/742889a08e10036dc30b8a7308f2a2a15b706883/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55e89d9d2f2e - main
[INFO] [stderr]     34:     0x7ff04b605083 - __libc_start_main
[INFO] [stderr]     35:     0x55e89d9cb3ce - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "354087aa88b9c25b56d5356fa294783a611f9a8298fb6fb0bb33467b1f6c6c54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "354087aa88b9c25b56d5356fa294783a611f9a8298fb6fb0bb33467b1f6c6c54", kill_on_drop: false }`
[INFO] [stdout] 354087aa88b9c25b56d5356fa294783a611f9a8298fb6fb0bb33467b1f6c6c54