Sep 04 20:54:11.108 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0 for pr-53893
Sep 04 20:54:11.108 INFO running: cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets
Sep 04 20:54:11.109 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53893/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-1/try#6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0:/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=500" "-e" "CMD=cargo +6b43b862fabb13a0ce2a5371ea1e77ee1674b7e0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 20:54:11.282 INFO blam! 7f4356f677442e74d04db10fa8ef682a5428134434edbab558da5a811249da93
Sep 04 20:54:11.284 INFO running `"docker" "start" "-a" "7f4356f677442e74d04db10fa8ef682a5428134434edbab558da5a811249da93"`
Sep 04 20:54:11.971 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 04 20:54:13.827 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 04 20:54:13.827 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-2fb9dc77566fa32b/build-script-build` (exit code: 101)
Sep 04 20:54:13.827 INFO kablam! --- stderr
Sep 04 20:54:13.827 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 04 20:54:13.827 INFO kablam! stack backtrace:
Sep 04 20:54:13.828 INFO kablam!    0:     0x55e108c5e5ce - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::ha53509682dbd7f85
Sep 04 20:54:13.828 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 04 20:54:13.828 INFO kablam!    1:     0x55e108c50406 - std::sys_common::backtrace::print::h3aced1bbe2b8ca94
Sep 04 20:54:13.828 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 04 20:54:13.828 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 04 20:54:13.828 INFO kablam!    2:     0x55e108c4edad - std::panicking::default_hook::{{closure}}::h76b1883c3c87e0fa
Sep 04 20:54:13.828 INFO kablam!                                at libstd/panicking.rs:211
Sep 04 20:54:13.828 INFO kablam!    3:     0x55e108c4eb20 - std::panicking::default_hook::h74b87988c51c021c
Sep 04 20:54:13.828 INFO kablam!                                at libstd/panicking.rs:227
Sep 04 20:54:13.828 INFO kablam!    4:     0x55e108c4f36c - std::panicking::rust_panic_with_hook::h3878be5cebe1ecc9
Sep 04 20:54:13.828 INFO kablam!                                at libstd/panicking.rs:477
Sep 04 20:54:13.828 INFO kablam!    5:     0x55e108c4ef69 - std::panicking::continue_panic_fmt::h7964842efee54f94
Sep 04 20:54:13.828 INFO kablam!                                at libstd/panicking.rs:391
Sep 04 20:54:13.828 INFO kablam!    6:     0x55e108c4ee65 - rust_begin_unwind
Sep 04 20:54:13.828 INFO kablam!                                at libstd/panicking.rs:326
Sep 04 20:54:13.828 INFO kablam!    7:     0x55e108c9f9bb - core::panicking::panic_fmt::h7fcf504efda3f2c3
Sep 04 20:54:13.828 INFO kablam!                                at libcore/panicking.rs:77
Sep 04 20:54:13.828 INFO kablam!    8:     0x55e108c9ade1 - core::option::expect_failed::h840e498c4999ce16
Sep 04 20:54:13.828 INFO kablam!                                at libcore/option.rs:1000
Sep 04 20:54:13.828 INFO kablam!    9:     0x55e108c2e3e3 - <core::option::Option<T>>::expect::hf3f2a513a6109f1c
Sep 04 20:54:13.828 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 04 20:54:13.828 INFO kablam!   10:     0x55e108c2c5cf - build_script_build::main::h4a59b692b3bde049
Sep 04 20:54:13.828 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 04 20:54:13.829 INFO kablam!   11:     0x55e108c2db1f - std::rt::lang_start::{{closure}}::h2d8d905f4d852664
Sep 04 20:54:13.829 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 04 20:54:13.829 INFO kablam!   12:     0x55e108c4ee52 - std::panicking::try::do_call::h2434b76b61552c7b
Sep 04 20:54:13.829 INFO kablam!                                at libstd/rt.rs:59
Sep 04 20:54:13.829 INFO kablam!                                at libstd/panicking.rs:310
Sep 04 20:54:13.829 INFO kablam!   13:     0x55e108c70939 - __rust_maybe_catch_panic
Sep 04 20:54:13.829 INFO kablam!                                at libpanic_unwind/lib.rs:103
Sep 04 20:54:13.829 INFO kablam!   14:     0x55e108c5a1b5 - std::rt::lang_start_internal::h60780ef6735385b7
Sep 04 20:54:13.829 INFO kablam!                                at libstd/panicking.rs:289
Sep 04 20:54:13.829 INFO kablam!                                at libstd/panic.rs:392
Sep 04 20:54:13.829 INFO kablam!                                at libstd/rt.rs:58
Sep 04 20:54:13.829 INFO kablam!   15:     0x55e108c2daf7 - std::rt::lang_start::hb97c69e65c6ae948
Sep 04 20:54:13.829 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 04 20:54:13.829 INFO kablam!   16:     0x55e108c2cdb9 - main
Sep 04 20:54:13.829 INFO kablam!   17:     0x7fb6253bc82f - __libc_start_main
Sep 04 20:54:13.829 INFO kablam!   18:     0x55e108c26398 - _start
Sep 04 20:54:13.829 INFO kablam!   19:                0x0 - <unknown>
Sep 04 20:54:13.829 INFO kablam! 
Sep 04 20:54:13.829 INFO kablam! su: No module specific data is present
Sep 04 20:54:14.337 INFO running `"docker" "rm" "-f" "7f4356f677442e74d04db10fa8ef682a5428134434edbab558da5a811249da93"`
Sep 04 20:54:14.425 INFO blam! 7f4356f677442e74d04db10fa8ef682a5428134434edbab558da5a811249da93