[INFO] fetching crate core_io 0.1.20190701...
[INFO] checking core_io-0.1.20190701 against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] extracting crate core_io 0.1.20190701 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate core_io 0.1.20190701 on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate core_io 0.1.20190701
[INFO] finished tweaking crates.io crate core_io 0.1.20190701
[INFO] tweaked toml for crates.io crate core_io 0.1.20190701 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37cae1601d9bdd8ea78ceed23fbe52563871859958e0142554ca6a54a32f9401
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "37cae1601d9bdd8ea78ceed23fbe52563871859958e0142554ca6a54a32f9401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37cae1601d9bdd8ea78ceed23fbe52563871859958e0142554ca6a54a32f9401", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37cae1601d9bdd8ea78ceed23fbe52563871859958e0142554ca6a54a32f9401", kill_on_drop: false }`
[INFO] [stdout] 37cae1601d9bdd8ea78ceed23fbe52563871859958e0142554ca6a54a32f9401
[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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cef9c5d37a2c9b09f0f84d661d683b6a30748e145137be43c333fa05635e9906
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cef9c5d37a2c9b09f0f84d661d683b6a30748e145137be43c333fa05635e9906", kill_on_drop: false }`
[INFO] [stderr]    Compiling core_io v0.1.20190701 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> build.rs:15:37
[INFO] [stdout]    |
[INFO] [stdout] 15 |     const P2: &'static str = r#"",""#; ;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: failed to run custom build command for `core_io v0.1.20190701 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/core_io-3c9d997b075d3cfa/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'Unknown compiler version, upgrade core_io?', build.rs:73:69
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55f1ca4ba667 - std::backtrace_rs::backtrace::libunwind::trace::h8bc78f7bc1f75bdb
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55f1ca4ba667 - std::backtrace_rs::backtrace::trace_unsynchronized::ha4c961c9576f95ba
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55f1ca4ba667 - std::sys_common::backtrace::_print_fmt::hc20cfdc233d6eb02
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55f1ca4ba667 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h04bea14549780a0f
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55f1ca4d4b0c - core::fmt::write::h3868db8542c90941
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/fmt/mod.rs:1096:17
[INFO] [stderr]      5:     0x55f1ca4b79d2 - std::io::Write::write_fmt::h55dd75636eef6a5c
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/io/mod.rs:1568:15
[INFO] [stderr]      6:     0x55f1ca4bc3b5 - std::sys_common::backtrace::_print::h6439e8525077c7da
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55f1ca4bc3b5 - std::sys_common::backtrace::print::h02b685f728ce3931
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55f1ca4bc3b5 - std::panicking::default_hook::{{closure}}::h7c29625065fafae1
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55f1ca4bbf13 - std::panicking::default_hook::hba441710bb71f4d5
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55f1ca4bcb51 - std::panicking::rust_panic_with_hook::ha936eb00e51bc4d9
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55f1ca4bc697 - std::panicking::begin_panic_handler::{{closure}}::hcd15140e0238536e
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x55f1ca4bab2c - std::sys_common::backtrace::__rust_end_short_backtrace::hb13a021bb64823a1
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55f1ca4bc5f9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55f1ca4d3ee1 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55f1ca4d3c73 - core::option::expect_failed::h8be1ca96ca0d69ca
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/option.rs:1258:5
[INFO] [stderr]     16:     0x55f1ca484391 - core::option::Option<T>::expect::h12283360284ae244
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/option.rs:349:21
[INFO] [stderr]     17:     0x55f1ca47f2d4 - build_script_build::main::h8d152481f86ba820
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:73:4
[INFO] [stderr]     18:     0x55f1ca4814eb - core::ops::function::FnOnce::call_once::h23a37bcec9ce84c3
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     19:     0x55f1ca48039e - std::sys_common::backtrace::__rust_begin_short_backtrace::hc0b71353e8650294
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     20:     0x55f1ca483b51 - std::rt::lang_start::{{closure}}::h1a62ddbac07b5d24
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/rt.rs:66:18
[INFO] [stderr]     21:     0x55f1ca4bcf77 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7c92107c3c98a949
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     22:     0x55f1ca4bcf77 - std::panicking::try::do_call::h7454c57e8fbf0cc1
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:379:40
[INFO] [stderr]     23:     0x55f1ca4bcf77 - std::panicking::try::he71cdc15ed83b5ec
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panicking.rs:343:19
[INFO] [stderr]     24:     0x55f1ca4bcf77 - std::panic::catch_unwind::hfc08ddb043e6e18c
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/panic.rs:396:14
[INFO] [stderr]     25:     0x55f1ca4bcf77 - std::rt::lang_start_internal::he4958117ec6901fd
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/rt.rs:51:25
[INFO] [stderr]     26:     0x55f1ca483b27 - std::rt::lang_start::h737f3b34319e0483
[INFO] [stderr]                                  at /rustc/82acd1d76add2232e19c1f0feb250d2a19ec6efe/library/std/src/rt.rs:65:5
[INFO] [stderr]     27:     0x55f1ca47ff6a - main
[INFO] [stderr]     28:     0x7fac29bfb0b3 - __libc_start_main
[INFO] [stderr]     29:     0x55f1ca47d0ae - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "cef9c5d37a2c9b09f0f84d661d683b6a30748e145137be43c333fa05635e9906", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cef9c5d37a2c9b09f0f84d661d683b6a30748e145137be43c333fa05635e9906", kill_on_drop: false }`
[INFO] [stdout] cef9c5d37a2c9b09f0f84d661d683b6a30748e145137be43c333fa05635e9906