[INFO] fetching crate rgen 0.5.0...
[INFO] checking rgen-0.5.0 against try#c3491e21996dc67a8e37d9e5e74ed156563e9854 for pr-101345
[INFO] extracting crate rgen 0.5.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rgen 0.5.0 on toolchain c3491e21996dc67a8e37d9e5e74ed156563e9854
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c3491e21996dc67a8e37d9e5e74ed156563e9854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rgen 0.5.0
[INFO] finished tweaking crates.io crate rgen 0.5.0
[INFO] tweaked toml for crates.io crate rgen 0.5.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c3491e21996dc67a8e37d9e5e74ed156563e9854" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c3491e21996dc67a8e37d9e5e74ed156563e9854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+c3491e21996dc67a8e37d9e5e74ed156563e9854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 593aeaf062a4f747722f2ae61a53f10f131e9f21dd9bb1c6c77596a878337f0e
[INFO] running `Command { std: "docker" "start" "-a" "593aeaf062a4f747722f2ae61a53f10f131e9f21dd9bb1c6c77596a878337f0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "593aeaf062a4f747722f2ae61a53f10f131e9f21dd9bb1c6c77596a878337f0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "593aeaf062a4f747722f2ae61a53f10f131e9f21dd9bb1c6c77596a878337f0e", kill_on_drop: false }`
[INFO] [stdout] 593aeaf062a4f747722f2ae61a53f10f131e9f21dd9bb1c6c77596a878337f0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+c3491e21996dc67a8e37d9e5e74ed156563e9854" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a282b35a0f5a36bb1e0b7a745310ff94f21afcf79319cec0b4d09feff27c7bb
[INFO] running `Command { std: "docker" "start" "-a" "7a282b35a0f5a36bb1e0b7a745310ff94f21afcf79319cec0b4d09feff27c7bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking signifix v0.9.0
[INFO] [stderr]     Checking array_tool v1.0.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.132`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-02d4e594eff5723f/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-0.2.132/build.rs:9:63
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55f762f14cc0 - std::backtrace_rs::backtrace::libunwind::trace::h6176bf60b78d74d6
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x55f762f14cc0 - std::backtrace_rs::backtrace::trace_unsynchronized::h5d22932bd33ba306
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55f762f14cc0 - std::sys_common::backtrace::_print_fmt::h91ed71259c388db3
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stderr]      3:     0x55f762f14cc0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hde15bb8cbf7665da
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stderr]      4:     0x55f762f31e5e - core::fmt::write::h9761a5598d7cc269
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/fmt/mod.rs:1202:17
[INFO] [stderr]      5:     0x55f762f11f75 - std::io::Write::write_fmt::h26becaaa3f318825
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/io/mod.rs:1679:15
[INFO] [stderr]      6:     0x55f762f163f3 - std::sys_common::backtrace::_print::hc10fefd61e366dd2
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stderr]      7:     0x55f762f163f3 - std::sys_common::backtrace::print::hd8c846072a354bbf
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stderr]      8:     0x55f762f163f3 - std::panicking::default_hook::{{closure}}::haa135eeb0555cd8c
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:295:22
[INFO] [stderr]      9:     0x55f762f160df - std::panicking::default_hook::h962e5f45e4e85804
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:314:9
[INFO] [stderr]     10:     0x55f762f16a9a - std::panicking::rust_panic_with_hook::h26097f8ccbe406f2
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:698:17
[INFO] [stderr]     11:     0x55f762f16997 - std::panicking::begin_panic_handler::{{closure}}::hc0f865aa1bb60c7c
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:588:13
[INFO] [stderr]     12:     0x55f762f151dc - std::sys_common::backtrace::__rust_end_short_backtrace::h6d4dc99be6f721b8
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stderr]     13:     0x55f762f166b2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:584:5
[INFO] [stderr]     14:     0x55f762eef9c3 - core::panicking::panic_fmt::h4db8cd7388285b2c
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/panicking.rs:142:14
[INFO] [stderr]     15:     0x55f762f31101 - core::panicking::panic_display::he73fdc935bdf497e
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/panicking.rs:72:5
[INFO] [stderr]     16:     0x55f762f310ab - core::panicking::panic_str::hb5cde10995c7cdaf
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/panicking.rs:56:5
[INFO] [stderr]     17:     0x55f762eef836 - core::option::expect_failed::h659f87154acb3c68
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/option.rs:1880:5
[INFO] [stderr]     18:     0x55f762ef16d2 - core::option::Option<T>::expect::h977b9acad7036e1f
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/option.rs:738:21
[INFO] [stderr]     19:     0x55f762ef54b4 - build_script_build::main::h0977883873497ecd
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.132/build.rs:9:41
[INFO] [stderr]     20:     0x55f762ef9c2b - core::ops::function::FnOnce::call_once::hf17364ec77d37b2f
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/ops/function.rs:248:5
[INFO] [stderr]     21:     0x55f762ef98ee - std::sys_common::backtrace::__rust_begin_short_backtrace::h83efaee8b43fed02
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stderr]     22:     0x55f762ef3821 - std::rt::lang_start::{{closure}}::h4cb7ae9c2eefd527
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55f762f0f59f - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::he95ed81489502271
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/core/src/ops/function.rs:280:13
[INFO] [stderr]     24:     0x55f762f0f59f - std::panicking::try::do_call::h0a45e27c5ac7207a
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:492:40
[INFO] [stderr]     25:     0x55f762f0f59f - std::panicking::try::h032b7145e06b96dd
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:456:19
[INFO] [stderr]     26:     0x55f762f0f59f - std::panic::catch_unwind::hcb3762214531769d
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55f762f0f59f - std::rt::lang_start_internal::{{closure}}::h49ed99b9e279c5c0
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55f762f0f59f - std::panicking::try::do_call::hd4e312809bc805d8
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:492:40
[INFO] [stderr]     29:     0x55f762f0f59f - std::panicking::try::hdb45bd293875ea13
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panicking.rs:456:19
[INFO] [stderr]     30:     0x55f762f0f59f - std::panic::catch_unwind::h429997a205aa583a
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55f762f0f59f - std::rt::lang_start_internal::hc8c7091d7b5a3029
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55f762ef37fa - std::rt::lang_start::h4f32ab8a3a8bd6c6
[INFO] [stderr]                                  at /rustc/c3491e21996dc67a8e37d9e5e74ed156563e9854/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55f762ef6c91 - main
[INFO] [stderr]     34:     0x7f0f53b24083 - __libc_start_main
[INFO] [stderr]     35:     0x55f762eefbbe - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "7a282b35a0f5a36bb1e0b7a745310ff94f21afcf79319cec0b4d09feff27c7bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a282b35a0f5a36bb1e0b7a745310ff94f21afcf79319cec0b4d09feff27c7bb", kill_on_drop: false }`
[INFO] [stdout] 7a282b35a0f5a36bb1e0b7a745310ff94f21afcf79319cec0b4d09feff27c7bb