Sep 01 07:29:48.858 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b for pr-53578
Sep 01 07:29:48.859 INFO running: cargo +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets
Sep 01 07:29:48.859 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53578/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578/worker-3/try#a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b:/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 +a5b9f2cc0cdaca8edf23a89c649279de2c91cd3b-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 07:29:49.066 INFO blam! 5bbbc934032cc03b4c71e6002fd0bceb0eb4dcf5e7d52efa5bae5ca3c3470306
Sep 01 07:29:49.068 INFO running `"docker" "start" "-a" "5bbbc934032cc03b4c71e6002fd0bceb0eb4dcf5e7d52efa5bae5ca3c3470306"`
Sep 01 07:29:49.664 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 01 07:29:51.045 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 01 07:29:51.045 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-85dad432e17cc3ac/build-script-build` (exit code: 101)
Sep 01 07:29:51.045 INFO kablam! --- stderr
Sep 01 07:29:51.045 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 01 07:29:51.045 INFO kablam! stack backtrace:
Sep 01 07:29:51.045 INFO kablam!    0:     0x55c44080460e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h5b93042d6f15f800
Sep 01 07:29:51.045 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 01 07:29:51.045 INFO kablam!    1:     0x55c4407f64b6 - std::sys_common::backtrace::print::h20e4b3ea37b660b2
Sep 01 07:29:51.045 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 01 07:29:51.045 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 01 07:29:51.045 INFO kablam!    2:     0x55c4407f4e2d - std::panicking::default_hook::{{closure}}::h795a478e1aaada94
Sep 01 07:29:51.045 INFO kablam!                                at libstd/panicking.rs:211
Sep 01 07:29:51.045 INFO kablam!    3:     0x55c4407f4ba0 - std::panicking::default_hook::h62c69762e441cd31
Sep 01 07:29:51.045 INFO kablam!                                at libstd/panicking.rs:227
Sep 01 07:29:51.045 INFO kablam!    4:     0x55c4407f53ec - std::panicking::rust_panic_with_hook::hb56a094fe82bce4d
Sep 01 07:29:51.045 INFO kablam!                                at libstd/panicking.rs:475
Sep 01 07:29:51.045 INFO kablam!    5:     0x55c4407f4fe9 - std::panicking::continue_panic_fmt::hbf794f131d328561
Sep 01 07:29:51.045 INFO kablam!                                at libstd/panicking.rs:390
Sep 01 07:29:51.045 INFO kablam!    6:     0x55c4407f4ee5 - rust_begin_unwind
Sep 01 07:29:51.046 INFO kablam!                                at libstd/panicking.rs:325
Sep 01 07:29:51.046 INFO kablam!    7:     0x55c440845bbb - core::panicking::panic_fmt::h85dffb31ab880568
Sep 01 07:29:51.046 INFO kablam!                                at libcore/panicking.rs:77
Sep 01 07:29:51.046 INFO kablam!    8:     0x55c440840f61 - core::option::expect_failed::hb633eb60ef279521
Sep 01 07:29:51.046 INFO kablam!                                at libcore/option.rs:1000
Sep 01 07:29:51.046 INFO kablam!    9:     0x55c4407d43e3 - <core::option::Option<T>>::expect::hcff16859af4541b6
Sep 01 07:29:51.046 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 01 07:29:51.046 INFO kablam!   10:     0x55c4407d25c5 - build_script_build::main::h631c1fe9777455f7
Sep 01 07:29:51.046 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 01 07:29:51.046 INFO kablam!   11:     0x55c4407d3b1f - std::rt::lang_start::{{closure}}::h1d839560a2bac39e
Sep 01 07:29:51.046 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 01 07:29:51.046 INFO kablam!   12:     0x55c4407f4ed2 - std::panicking::try::do_call::h344c73344a3fd6f6
Sep 01 07:29:51.046 INFO kablam!                                at libstd/rt.rs:59
Sep 01 07:29:51.046 INFO kablam!                                at libstd/panicking.rs:310
Sep 01 07:29:51.046 INFO kablam!   13:     0x55c440816ae9 - __rust_maybe_catch_panic
Sep 01 07:29:51.046 INFO kablam!                                at libpanic_unwind/lib.rs:102
Sep 01 07:29:51.046 INFO kablam!   14:     0x55c440800225 - std::rt::lang_start_internal::h4ab4abaf01dcd012
Sep 01 07:29:51.046 INFO kablam!                                at libstd/panicking.rs:289
Sep 01 07:29:51.046 INFO kablam!                                at libstd/panic.rs:392
Sep 01 07:29:51.046 INFO kablam!                                at libstd/rt.rs:58
Sep 01 07:29:51.046 INFO kablam!   15:     0x55c4407d3af7 - std::rt::lang_start::h0bc4e0d8ab4fad79
Sep 01 07:29:51.046 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 01 07:29:51.046 INFO kablam!   16:     0x55c4407d2db9 - main
Sep 01 07:29:51.046 INFO kablam!   17:     0x7f7d48ac582f - __libc_start_main
Sep 01 07:29:51.046 INFO kablam!   18:     0x55c4407cc388 - _start
Sep 01 07:29:51.046 INFO kablam!   19:                0x0 - <unknown>
Sep 01 07:29:51.047 INFO kablam! 
Sep 01 07:29:51.047 INFO kablam! su: No module specific data is present
Sep 01 07:29:51.486 INFO running `"docker" "rm" "-f" "5bbbc934032cc03b4c71e6002fd0bceb0eb4dcf5e7d52efa5bae5ca3c3470306"`
Sep 01 07:29:51.585 INFO blam! 5bbbc934032cc03b4c71e6002fd0bceb0eb4dcf5e7d52efa5bae5ca3c3470306