[INFO] crate core_collections 0.3.20170409 is already in cache
[INFO] checking core_collections-0.3.20170409 against master#212aa3ea28d91a97d1e1261709c0b6e6790788e6 for pr-69340
[INFO] extracting crate core_collections 0.3.20170409 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate core_collections 0.3.20170409 on toolchain 212aa3ea28d91a97d1e1261709c0b6e6790788e6
[INFO] running `"/workspace/cargo-home/bin/cargo" "+212aa3ea28d91a97d1e1261709c0b6e6790788e6" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate core_collections 0.3.20170409
[INFO] finished tweaking crates.io crate core_collections 0.3.20170409
[INFO] tweaked toml for crates.io crate core_collections 0.3.20170409 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+212aa3ea28d91a97d1e1261709c0b6e6790788e6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+212aa3ea28d91a97d1e1261709c0b6e6790788e6" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+212aa3ea28d91a97d1e1261709c0b6e6790788e6" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 99e3e27a889d3d5dd0f4ff58354e7687ba92fc584d0cbe24f501d1dec02353c1
[INFO] running `"docker" "start" "-a" "99e3e27a889d3d5dd0f4ff58354e7687ba92fc584d0cbe24f501d1dec02353c1"`
[INFO] [stderr]    Compiling core_collections v0.3.20170409 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `core_collections v0.3.20170409 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/core_collections-317a9083d4c475ed/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', build.rs:48:13
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5618374ae374 - backtrace::backtrace::libunwind::trace::h2f6ff4a33b1e15bd
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86
[INFO] [stderr]    1:     0x5618374ae374 - backtrace::backtrace::trace_unsynchronized::h1c74f218935a964e
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x5618374ae374 - std::sys_common::backtrace::_print_fmt::he616a2ffb42d7095
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x5618374ae374 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3630928d424e5705
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x5618374cbd5c - core::fmt::write::h51cecfc4364da7ce
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1052
[INFO] [stderr]    5:     0x5618374ab727 - std::io::Write::write_fmt::hc4f750c57e05a637
[INFO] [stderr]                                at src/libstd/io/mod.rs:1428
[INFO] [stderr]    6:     0x5618374b0845 - std::sys_common::backtrace::_print::hf5f697e6be8faefc
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x5618374b0845 - std::sys_common::backtrace::print::h82e92953d052a9e7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x5618374b0845 - std::panicking::default_hook::{{closure}}::hc7dd9b0d16882bee
[INFO] [stderr]                                at src/libstd/panicking.rs:204
[INFO] [stderr]    9:     0x5618374b0586 - std::panicking::default_hook::h36e2db9fb0f86871
[INFO] [stderr]                                at src/libstd/panicking.rs:224
[INFO] [stderr]   10:     0x5618374b0e02 - std::panicking::rust_panic_with_hook::h68e7a51e63e4fdd1
[INFO] [stderr]                                at src/libstd/panicking.rs:470
[INFO] [stderr]   11:     0x5618374b09eb - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:378
[INFO] [stderr]   12:     0x5618374cafa1 - core::panicking::panic_fmt::hdec8bb9799ee149c
[INFO] [stderr]                                at src/libcore/panicking.rs:85
[INFO] [stderr]   13:     0x5618374cad33 - core::option::expect_failed::h358d22b949ba4184
[INFO] [stderr]                                at src/libcore/option.rs:1203
[INFO] [stderr]   14:     0x5618374861bf - core::option::Option<T>::expect::ha0590d6342c5aaa2
[INFO] [stderr]                                at /rustc/212aa3ea28d91a97d1e1261709c0b6e6790788e6/src/libcore/option.rs:347
[INFO] [stderr]   15:     0x561837484764 - build_script_build::main::hfb65587d1e918936
[INFO] [stderr]                                at /opt/rustwide/workdir/build.rs:48
[INFO] [stderr]   16:     0x56183748688b - std::rt::lang_start::{{closure}}::h9c61297bdc69544f
[INFO] [stderr]                                at /rustc/212aa3ea28d91a97d1e1261709c0b6e6790788e6/src/libstd/rt.rs:67
[INFO] [stderr]   17:     0x5618374b0913 - std::rt::lang_start_internal::{{closure}}::h5734d12debc7ef02
[INFO] [stderr]                                at src/libstd/rt.rs:52
[INFO] [stderr]   18:     0x5618374b0913 - std::panicking::try::do_call::ha59ccfbb0233cd67
[INFO] [stderr]                                at src/libstd/panicking.rs:303
[INFO] [stderr]   19:     0x5618374b7127 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:86
[INFO] [stderr]   20:     0x5618374b12a9 - std::panicking::try::hb1f8b5942fedc28f
[INFO] [stderr]                                at src/libstd/panicking.rs:281
[INFO] [stderr]   21:     0x5618374b12a9 - std::panic::catch_unwind::h3cfbd670c04cfa0a
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   22:     0x5618374b12a9 - std::rt::lang_start_internal::h86b43da953c7be5a
[INFO] [stderr]                                at src/libstd/rt.rs:51
[INFO] [stderr]   23:     0x561837486867 - std::rt::lang_start::h3b4c36165fd708c7
[INFO] [stderr]                                at /rustc/212aa3ea28d91a97d1e1261709c0b6e6790788e6/src/libstd/rt.rs:67
[INFO] [stderr]   24:     0x561837484f9a - main
[INFO] [stderr]   25:     0x7fa6f3874b97 - __libc_start_main
[INFO] [stderr]   26:     0x56183747e5ca - _start
[INFO] [stderr]   27:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "99e3e27a889d3d5dd0f4ff58354e7687ba92fc584d0cbe24f501d1dec02353c1"`
[INFO] running `"docker" "rm" "-f" "99e3e27a889d3d5dd0f4ff58354e7687ba92fc584d0cbe24f501d1dec02353c1"`
[INFO] [stdout] 99e3e27a889d3d5dd0f4ff58354e7687ba92fc584d0cbe24f501d1dec02353c1