[INFO] cloning repository https://github.com/YannikSc/rustgen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YannikSc/rustgen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYannikSc%2Frustgen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYannikSc%2Frustgen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bfe8a2e07aafc2d620baa085a6ba023f14c812de
[INFO] building YannikSc/rustgen against try#8e6760e82a081fb624e777d52ef744c1def2f593 for pr-105577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYannikSc%2Frustgen" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YannikSc/rustgen on toolchain 8e6760e82a081fb624e777d52ef744c1def2f593
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e6760e82a081fb624e777d52ef744c1def2f593" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/YannikSc/rustgen
[INFO] finished tweaking git repo https://github.com/YannikSc/rustgen
[INFO] tweaked toml for git repo https://github.com/YannikSc/rustgen written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/YannikSc/rustgen already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e6760e82a081fb624e777d52ef744c1def2f593" "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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+8e6760e82a081fb624e777d52ef744c1def2f593" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b497b836132e53f904536f601742f24b4018cf1650b83cb632577ce78dcb0446
[INFO] running `Command { std: "docker" "start" "-a" "b497b836132e53f904536f601742f24b4018cf1650b83cb632577ce78dcb0446", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b497b836132e53f904536f601742f24b4018cf1650b83cb632577ce78dcb0446", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b497b836132e53f904536f601742f24b4018cf1650b83cb632577ce78dcb0446", kill_on_drop: false }`
[INFO] [stdout] b497b836132e53f904536f601742f24b4018cf1650b83cb632577ce78dcb0446
[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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+8e6760e82a081fb624e777d52ef744c1def2f593" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33fa64644a4a6b9ba6b13f67fdbf1b178365eabd4be15508e2bce319a84de8d2
[INFO] running `Command { std: "docker" "start" "-a" "33fa64644a4a6b9ba6b13f67fdbf1b178365eabd4be15508e2bce319a84de8d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.61
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling dtoa v0.4.7
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling quick-error v2.0.0
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.88`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-36fc0c12f75962be/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-0.2.88/build.rs:7:31
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x56275266adda - std::backtrace_rs::backtrace::libunwind::trace::h9935aa51e67ff547
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stderr]      1:     0x56275266adda - std::backtrace_rs::backtrace::trace_unsynchronized::h22fd361b9bc5c4cb
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x56275266adda - std::sys_common::backtrace::_print_fmt::hd12f5ae351cd776c
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stderr]      3:     0x56275266adda - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h41d96e4f233916e4
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x56275268834e - core::fmt::write::h3b7711f30e618cd4
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/fmt/mod.rs:1208:17
[INFO] [stderr]      5:     0x562752668449 - std::io::Write::write_fmt::hd0d3dcd309d3cd9f
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/io/mod.rs:1682:15
[INFO] [stderr]      6:     0x56275266aba5 - std::sys_common::backtrace::_print::h162a97c9b16e4aac
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      7:     0x56275266aba5 - std::sys_common::backtrace::print::hfb66d51ea9664dde
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      8:     0x56275266c20f - std::panicking::default_hook::{{closure}}::h6b6b85100f7b3d02
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:267:22
[INFO] [stderr]      9:     0x56275266bf4b - std::panicking::default_hook::h3e20b5c505006d3e
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:286:9
[INFO] [stderr]     10:     0x56275266c91c - std::panicking::rust_panic_with_hook::h9fff36b9d2853e92
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:688:13
[INFO] [stderr]     11:     0x56275266c6b9 - std::panicking::begin_panic_handler::{{closure}}::h572d99bab01822a3
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:579:13
[INFO] [stderr]     12:     0x56275266b256 - std::sys_common::backtrace::__rust_end_short_backtrace::hfb125e177e800663
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stderr]     13:     0x56275266c3c2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:575:5
[INFO] [stderr]     14:     0x562752640193 - core::panicking::panic_fmt::h6fddff0b0c1f7a20
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/panicking.rs:64:14
[INFO] [stderr]     15:     0x562752687841 - core::panicking::panic_display::ha8fcbc0dca8cbe18
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/panicking.rs:135:5
[INFO] [stderr]     16:     0x5627526877eb - core::panicking::panic_str::h3e8c647bf5f4d0a9
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/panicking.rs:119:5
[INFO] [stderr]     17:     0x562752640156 - core::option::expect_failed::h9a173ec0b1495579
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/option.rs:1879:5
[INFO] [stderr]     18:     0x562752645cb6 - core::option::Option<T>::expect::h215ca98a72325876
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/option.rs:741:21
[INFO] [stderr]     19:     0x56275264a0f9 - build_script_build::main::h63dae16b2635677a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.88/build.rs:7:9
[INFO] [stderr]     20:     0x56275264c57b - core::ops::function::FnOnce::call_once::hcd48fef2a2d4b5e9
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/ops/function.rs:507:5
[INFO] [stderr]     21:     0x56275264413e - std::sys_common::backtrace::__rust_begin_short_backtrace::h08c4a12b8d3b5d06
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stderr]     22:     0x5627526441b1 - std::rt::lang_start::{{closure}}::h818190ef7f105810
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x5627526657ae - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::he228b7d32d45709a
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/core/src/ops/function.rs:606:13
[INFO] [stderr]     24:     0x5627526657ae - std::panicking::try::do_call::h2a7269b12a63177b
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:483:40
[INFO] [stderr]     25:     0x5627526657ae - std::panicking::try::hf00014375163b180
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:447:19
[INFO] [stderr]     26:     0x5627526657ae - std::panic::catch_unwind::h892b361a9e55fd3c
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x5627526657ae - std::rt::lang_start_internal::{{closure}}::h1c4356d52f9de60c
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x5627526657ae - std::panicking::try::do_call::h34037420ee4bf531
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:483:40
[INFO] [stderr]     29:     0x5627526657ae - std::panicking::try::h07d8a6a2ff788d0d
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panicking.rs:447:19
[INFO] [stderr]     30:     0x5627526657ae - std::panic::catch_unwind::h5542efb545530f09
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x5627526657ae - std::rt::lang_start_internal::h0e15a504169d0674
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x56275264418a - std::rt::lang_start::h72941df7268c5293
[INFO] [stderr]                                  at /rustc/8e6760e82a081fb624e777d52ef744c1def2f593/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x56275264b78e - main
[INFO] [stderr]     34:     0x7fbd8ede6083 - __libc_start_main
[INFO] [stderr]     35:     0x5627526406ae - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "33fa64644a4a6b9ba6b13f67fdbf1b178365eabd4be15508e2bce319a84de8d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33fa64644a4a6b9ba6b13f67fdbf1b178365eabd4be15508e2bce319a84de8d2", kill_on_drop: false }`
[INFO] [stdout] 33fa64644a4a6b9ba6b13f67fdbf1b178365eabd4be15508e2bce319a84de8d2