Sep 06 08:31:19.253 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6 for pr-53854
Sep 06 08:31:19.253 INFO running: cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets
Sep 06 08:31:19.253 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53854/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-1/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 08:31:19.433 INFO blam! de1e55dec2a30f09a4b62db2ca937fe9fa503d67ce8dd3074560574db2ecca42
Sep 06 08:31:19.435 INFO running `"docker" "start" "-a" "de1e55dec2a30f09a4b62db2ca937fe9fa503d67ce8dd3074560574db2ecca42"`
Sep 06 08:31:20.442 INFO kablam! usermod: no changes
Sep 06 08:31:20.558 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 06 08:31:21.885 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 06 08:31:21.885 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-f33a9120f0892e47/build-script-build` (exit code: 101)
Sep 06 08:31:21.885 INFO kablam! --- stderr
Sep 06 08:31:21.885 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 06 08:31:21.885 INFO kablam! stack backtrace:
Sep 06 08:31:21.885 INFO kablam!    0:     0x55cdb349937e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h082e5fdf9aff33df
Sep 06 08:31:21.885 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 06 08:31:21.885 INFO kablam!    1:     0x55cdb348b276 - std::sys_common::backtrace::print::hef53554d827c8c8b
Sep 06 08:31:21.885 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 06 08:31:21.886 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 06 08:31:21.886 INFO kablam!    2:     0x55cdb3489bcd - std::panicking::default_hook::{{closure}}::h34861d43158e89b9
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:211
Sep 06 08:31:21.886 INFO kablam!    3:     0x55cdb3489940 - std::panicking::default_hook::h8898fb997741a086
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:227
Sep 06 08:31:21.886 INFO kablam!    4:     0x55cdb348a18c - std::panicking::rust_panic_with_hook::h2a2e767b3fe52fcb
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:477
Sep 06 08:31:21.886 INFO kablam!    5:     0x55cdb3489d89 - std::panicking::continue_panic_fmt::h2ca0f17b68b08aea
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:391
Sep 06 08:31:21.886 INFO kablam!    6:     0x55cdb3489c85 - rust_begin_unwind
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:326
Sep 06 08:31:21.886 INFO kablam!    7:     0x55cdb34d994b - core::panicking::panic_fmt::h26cf321176496c12
Sep 06 08:31:21.886 INFO kablam!                                at libcore/panicking.rs:77
Sep 06 08:31:21.886 INFO kablam!    8:     0x55cdb34d4d71 - core::option::expect_failed::h262182f406ffde3a
Sep 06 08:31:21.886 INFO kablam!                                at libcore/option.rs:1000
Sep 06 08:31:21.886 INFO kablam!    9:     0x55cdb34683b3 - <core::option::Option<T>>::expect::h2764e9e4e12cdd8b
Sep 06 08:31:21.886 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 06 08:31:21.886 INFO kablam!   10:     0x55cdb346659f - build_script_build::main::h6fe93da679bfd656
Sep 06 08:31:21.886 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 06 08:31:21.886 INFO kablam!   11:     0x55cdb3467aef - std::rt::lang_start::{{closure}}::h7f67489cb4fb1061
Sep 06 08:31:21.886 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 06 08:31:21.886 INFO kablam!   12:     0x55cdb3489c72 - std::panicking::try::do_call::hd6568c1e1325fac3
Sep 06 08:31:21.886 INFO kablam!                                at libstd/rt.rs:59
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:310
Sep 06 08:31:21.886 INFO kablam!   13:     0x55cdb34aa8c9 - __rust_maybe_catch_panic
Sep 06 08:31:21.886 INFO kablam!                                at libpanic_unwind/lib.rs:103
Sep 06 08:31:21.886 INFO kablam!   14:     0x55cdb3494f85 - std::rt::lang_start_internal::hf4a29d9afcf3f720
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panicking.rs:289
Sep 06 08:31:21.886 INFO kablam!                                at libstd/panic.rs:392
Sep 06 08:31:21.886 INFO kablam!                                at libstd/rt.rs:58
Sep 06 08:31:21.886 INFO kablam!   15:     0x55cdb3467ac7 - std::rt::lang_start::h43b4945248b195e0
Sep 06 08:31:21.886 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 06 08:31:21.886 INFO kablam!   16:     0x55cdb3466d89 - main
Sep 06 08:31:21.886 INFO kablam!   17:     0x7f0f6360982f - __libc_start_main
Sep 06 08:31:21.886 INFO kablam!   18:     0x55cdb3460368 - _start
Sep 06 08:31:21.886 INFO kablam!   19:                0x0 - <unknown>
Sep 06 08:31:21.886 INFO kablam! 
Sep 06 08:31:21.896 INFO kablam! su: No module specific data is present
Sep 06 08:31:22.809 INFO running `"docker" "rm" "-f" "de1e55dec2a30f09a4b62db2ca937fe9fa503d67ce8dd3074560574db2ecca42"`
Sep 06 08:31:22.930 INFO blam! de1e55dec2a30f09a4b62db2ca937fe9fa503d67ce8dd3074560574db2ecca42