Sep 10 20:52:49.571 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 20:52:49.571 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 20:52:49.571 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-3/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 20:52:49.760 INFO blam! 77b0e73ceba14734f88267e21289733c79e811eb31eac5b205fc42a4e32f27e5
Sep 10 20:52:49.762 INFO running `"docker" "start" "-a" "77b0e73ceba14734f88267e21289733c79e811eb31eac5b205fc42a4e32f27e5"`
Sep 10 20:52:50.291 INFO kablam! usermod: no changes
Sep 10 20:52:50.339 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 10 20:52:51.461 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 10 20:52:51.461 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-09149f1ba07a3652/build-script-build` (exit code: 101)
Sep 10 20:52:51.461 INFO kablam! --- stderr
Sep 10 20:52:51.461 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 10 20:52:51.461 INFO kablam! stack backtrace:
Sep 10 20:52:51.461 INFO kablam!    0:     0x55f91868531e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6fe5173ae235b38f
Sep 10 20:52:51.461 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 10 20:52:51.461 INFO kablam!    1:     0x55f9186771c6 - std::sys_common::backtrace::print::hb1efbd3d067eabc6
Sep 10 20:52:51.461 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 10 20:52:51.461 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 10 20:52:51.461 INFO kablam!    2:     0x55f918675b6d - std::panicking::default_hook::{{closure}}::h109166af4c755142
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:211
Sep 10 20:52:51.461 INFO kablam!    3:     0x55f9186758e0 - std::panicking::default_hook::h992f159215e34f14
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:227
Sep 10 20:52:51.461 INFO kablam!    4:     0x55f91867612c - std::panicking::rust_panic_with_hook::h7d90dcad0bb485f2
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:477
Sep 10 20:52:51.461 INFO kablam!    5:     0x55f918675d29 - std::panicking::continue_panic_fmt::hd1c785c0ba366e26
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:391
Sep 10 20:52:51.461 INFO kablam!    6:     0x55f918675c25 - rust_begin_unwind
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:326
Sep 10 20:52:51.461 INFO kablam!    7:     0x55f9186c58eb - core::panicking::panic_fmt::hd57c6dafe91b27ac
Sep 10 20:52:51.461 INFO kablam!                                at libcore/panicking.rs:77
Sep 10 20:52:51.461 INFO kablam!    8:     0x55f9186c0d11 - core::option::expect_failed::hdc667ff7aca6a4a1
Sep 10 20:52:51.461 INFO kablam!                                at libcore/option.rs:1000
Sep 10 20:52:51.461 INFO kablam!    9:     0x55f9186543b3 - <core::option::Option<T>>::expect::h1b84c1bc3ec41e99
Sep 10 20:52:51.461 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 10 20:52:51.461 INFO kablam!   10:     0x55f91865259f - build_script_build::main::h2af089a371ec6c40
Sep 10 20:52:51.461 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 10 20:52:51.461 INFO kablam!   11:     0x55f918653aef - std::rt::lang_start::{{closure}}::h0ef3dac420f5cfd8
Sep 10 20:52:51.461 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 10 20:52:51.461 INFO kablam!   12:     0x55f918675c12 - std::panicking::try::do_call::h2ece1f76d9e135ca
Sep 10 20:52:51.461 INFO kablam!                                at libstd/rt.rs:59
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:310
Sep 10 20:52:51.461 INFO kablam!   13:     0x55f918696529 - __rust_maybe_catch_panic
Sep 10 20:52:51.461 INFO kablam!                                at libpanic_unwind/lib.rs:103
Sep 10 20:52:51.461 INFO kablam!   14:     0x55f918680f75 - std::rt::lang_start_internal::h72dcb4aefab2c171
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panicking.rs:289
Sep 10 20:52:51.461 INFO kablam!                                at libstd/panic.rs:392
Sep 10 20:52:51.462 INFO kablam!                                at libstd/rt.rs:58
Sep 10 20:52:51.462 INFO kablam!   15:     0x55f918653ac7 - std::rt::lang_start::h70da4a7f65b6508b
Sep 10 20:52:51.462 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 10 20:52:51.462 INFO kablam!   16:     0x55f918652d89 - main
Sep 10 20:52:51.462 INFO kablam!   17:     0x7f9d0c93382f - __libc_start_main
Sep 10 20:52:51.462 INFO kablam!   18:     0x55f91864c368 - _start
Sep 10 20:52:51.462 INFO kablam!   19:                0x0 - <unknown>
Sep 10 20:52:51.463 INFO kablam! 
Sep 10 20:52:51.465 INFO kablam! su: No module specific data is present
Sep 10 20:52:52.332 INFO running `"docker" "rm" "-f" "77b0e73ceba14734f88267e21289733c79e811eb31eac5b205fc42a4e32f27e5"`
Sep 10 20:52:52.448 INFO blam! 77b0e73ceba14734f88267e21289733c79e811eb31eac5b205fc42a4e32f27e5