[INFO] cloning repository https://github.com/ZKtheMAN/langtons-ant
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ZKtheMAN/langtons-ant" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZKtheMAN%2Flangtons-ant", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZKtheMAN%2Flangtons-ant'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec07b5bb60b395b1e46d3e8a15fbb52942c91094
[INFO] building ZKtheMAN/langtons-ant against try#b755f8b9936d084e0363ce6b393c7e444a37080e for pr-97334-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZKtheMAN%2Flangtons-ant" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZKtheMAN/langtons-ant on toolchain b755f8b9936d084e0363ce6b393c7e444a37080e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b755f8b9936d084e0363ce6b393c7e444a37080e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ZKtheMAN/langtons-ant
[INFO] finished tweaking git repo https://github.com/ZKtheMAN/langtons-ant
[INFO] tweaked toml for git repo https://github.com/ZKtheMAN/langtons-ant written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ZKtheMAN/langtons-ant already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b755f8b9936d084e0363ce6b393c7e444a37080e" "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" "+b755f8b9936d084e0363ce6b393c7e444a37080e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85e694ed63813a81a7a84cbe0493e45f553fb8438a8d632ef108faef5661e7f5
[INFO] running `Command { std: "docker" "start" "-a" "85e694ed63813a81a7a84cbe0493e45f553fb8438a8d632ef108faef5661e7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85e694ed63813a81a7a84cbe0493e45f553fb8438a8d632ef108faef5661e7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85e694ed63813a81a7a84cbe0493e45f553fb8438a8d632ef108faef5661e7f5", kill_on_drop: false }`
[INFO] [stdout] 85e694ed63813a81a7a84cbe0493e45f553fb8438a8d632ef108faef5661e7f5
[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" "+b755f8b9936d084e0363ce6b393c7e444a37080e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1978bb0d90bd57420528f59e91f7914f1966f62b285e0508c4493cd74a62015
[INFO] running `Command { std: "docker" "start" "-a" "e1978bb0d90bd57420528f59e91f7914f1966f62b285e0508c4493cd74a62015", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling sdl2 v0.33.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling spin_sleep v0.3.7
[INFO] [stderr]    Compiling sdl2-sys v0.33.0
[INFO] [stderr] error: failed to run custom build command for `libc v0.2.68`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/libc-a9ec6d53c1ff640b/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-0.2.68/build.rs:7:31
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55f0620899a0 - std::backtrace_rs::backtrace::libunwind::trace::h0635bbcc15f1a527
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      1:     0x55f0620899a0 - std::backtrace_rs::backtrace::trace_unsynchronized::h2f139649c4717994
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55f0620899a0 - std::sys_common::backtrace::_print_fmt::h1bfd64239328f990
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:66:5
[INFO] [stderr]      3:     0x55f0620899a0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0228dc1410a56233
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:45:22
[INFO] [stderr]      4:     0x55f0620a6a5e - core::fmt::write::hceb37e40129b2ef6
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/fmt/mod.rs:1202:17
[INFO] [stderr]      5:     0x55f062086bc5 - std::io::Write::write_fmt::h7aef09b2f8dd6912
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/io/mod.rs:1679:15
[INFO] [stderr]      6:     0x55f06208b093 - std::sys_common::backtrace::_print::h9317a39a27ffc158
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:48:5
[INFO] [stderr]      7:     0x55f06208b093 - std::sys_common::backtrace::print::h3f862bf30220d547
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:35:9
[INFO] [stderr]      8:     0x55f06208b093 - std::panicking::default_hook::{{closure}}::h5f1809c5cfd4c61f
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:295:22
[INFO] [stderr]      9:     0x55f06208ad7f - std::panicking::default_hook::h48ae03b43c4da387
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:314:9
[INFO] [stderr]     10:     0x55f06208b73a - std::panicking::rust_panic_with_hook::h064155defabdfb6a
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:698:17
[INFO] [stderr]     11:     0x55f06208b637 - std::panicking::begin_panic_handler::{{closure}}::ha0af59eade27c129
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:588:13
[INFO] [stderr]     12:     0x55f062089e7c - std::sys_common::backtrace::__rust_end_short_backtrace::h9a8746ae64120b62
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:138:18
[INFO] [stderr]     13:     0x55f06208b352 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:584:5
[INFO] [stderr]     14:     0x55f062064a93 - core::panicking::panic_fmt::h7c5c6b7648371e09
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/panicking.rs:142:14
[INFO] [stderr]     15:     0x55f0620a5d01 - core::panicking::panic_display::h8354ea7d5b758b84
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/panicking.rs:72:5
[INFO] [stderr]     16:     0x55f0620a5cab - core::panicking::panic_str::h1ec13731fcfa16f5
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/panicking.rs:56:5
[INFO] [stderr]     17:     0x55f062064906 - core::option::expect_failed::hd656a46093a9d781
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/option.rs:1880:5
[INFO] [stderr]     18:     0x55f062066aa2 - core::option::Option<T>::expect::he874c1bfed64966d
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/option.rs:738:21
[INFO] [stderr]     19:     0x55f06206cfb7 - build_script_build::main::h6724362a56e39cd8
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libc-0.2.68/build.rs:7:9
[INFO] [stderr]     20:     0x55f06206e80b - core::ops::function::FnOnce::call_once::h9fe173cf6eb657dc
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/ops/function.rs:248:5
[INFO] [stderr]     21:     0x55f06206e4ae - std::sys_common::backtrace::__rust_begin_short_backtrace::h4f3148a4789faef5
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/sys_common/backtrace.rs:122:18
[INFO] [stderr]     22:     0x55f062067a91 - std::rt::lang_start::{{closure}}::h712a0f4d522b13ef
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/rt.rs:166:18
[INFO] [stderr]     23:     0x55f06208423f - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::haddfa23a306951d5
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/core/src/ops/function.rs:280:13
[INFO] [stderr]     24:     0x55f06208423f - std::panicking::try::do_call::hcb89ab862dc14559
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:492:40
[INFO] [stderr]     25:     0x55f06208423f - std::panicking::try::h5a0f5a583bd42358
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:456:19
[INFO] [stderr]     26:     0x55f06208423f - std::panic::catch_unwind::h1b33e43ac44c513a
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panic.rs:137:14
[INFO] [stderr]     27:     0x55f06208423f - std::rt::lang_start_internal::{{closure}}::h3e8c3a482435afc4
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55f06208423f - std::panicking::try::do_call::hde9a061b8c422f41
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:492:40
[INFO] [stderr]     29:     0x55f06208423f - std::panicking::try::h7c906dda3c72e803
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panicking.rs:456:19
[INFO] [stderr]     30:     0x55f06208423f - std::panic::catch_unwind::he19ce2d20efecfc9
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/panic.rs:137:14
[INFO] [stderr]     31:     0x55f06208423f - std::rt::lang_start_internal::h7726f947755f564f
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55f062067a6a - std::rt::lang_start::h91ef42f6e089283e
[INFO] [stderr]                                  at /rustc/b755f8b9936d084e0363ce6b393c7e444a37080e/library/std/src/rt.rs:165:17
[INFO] [stderr]     33:     0x55f06206e461 - main
[INFO] [stderr]     34:     0x7f3613040083 - __libc_start_main
[INFO] [stderr]     35:     0x55f062064c6e - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e1978bb0d90bd57420528f59e91f7914f1966f62b285e0508c4493cd74a62015", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1978bb0d90bd57420528f59e91f7914f1966f62b285e0508c4493cd74a62015", kill_on_drop: false }`
[INFO] [stdout] e1978bb0d90bd57420528f59e91f7914f1966f62b285e0508c4493cd74a62015