Sep 10 20:52:49.948 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 20:52:49.948 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 20:52:49.948 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-4/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 20:52:50.123 INFO blam! e5881fe48d824188f09343963d6b5178b7cc01967413b4b95f46f72ac45b6b81
Sep 10 20:52:50.125 INFO running `"docker" "start" "-a" "e5881fe48d824188f09343963d6b5178b7cc01967413b4b95f46f72ac45b6b81"`
Sep 10 20:52:50.702 INFO kablam! usermod: no changes
Sep 10 20:52:50.750 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 10 20:52:51.794 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 10 20:52:51.794 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-ff8b74ad393e4bcc/build-script-build` (exit code: 101)
Sep 10 20:52:51.794 INFO kablam! --- stderr
Sep 10 20:52:51.794 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 10 20:52:51.794 INFO kablam! stack backtrace:
Sep 10 20:52:51.794 INFO kablam!    0:     0x55879be7f31e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::hd1ddf909c3007e6f
Sep 10 20:52:51.794 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 10 20:52:51.794 INFO kablam!    1:     0x55879be71276 - std::sys_common::backtrace::print::h8af87ee7033cea48
Sep 10 20:52:51.794 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 10 20:52:51.794 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 10 20:52:51.794 INFO kablam!    2:     0x55879be6fbcd - std::panicking::default_hook::{{closure}}::hb070ea60f8cf9536
Sep 10 20:52:51.794 INFO kablam!                                at libstd/panicking.rs:211
Sep 10 20:52:51.794 INFO kablam!    3:     0x55879be6f940 - std::panicking::default_hook::h108b3d1da16fc0ff
Sep 10 20:52:51.794 INFO kablam!                                at libstd/panicking.rs:227
Sep 10 20:52:51.794 INFO kablam!    4:     0x55879be7018c - std::panicking::rust_panic_with_hook::he22c3c9d0a2321e8
Sep 10 20:52:51.794 INFO kablam!                                at libstd/panicking.rs:477
Sep 10 20:52:51.794 INFO kablam!    5:     0x55879be6fd89 - std::panicking::continue_panic_fmt::h4cfdbf744ac7dbe3
Sep 10 20:52:51.794 INFO kablam!                                at libstd/panicking.rs:391
Sep 10 20:52:51.794 INFO kablam!    6:     0x55879be6fc85 - rust_begin_unwind
Sep 10 20:52:51.794 INFO kablam!                                at libstd/panicking.rs:326
Sep 10 20:52:51.794 INFO kablam!    7:     0x55879bebf8eb - core::panicking::panic_fmt::hb8c59f4cf64cfbdd
Sep 10 20:52:51.794 INFO kablam!                                at libcore/panicking.rs:77
Sep 10 20:52:51.794 INFO kablam!    8:     0x55879bebad11 - core::option::expect_failed::h881c05a2b045e394
Sep 10 20:52:51.794 INFO kablam!                                at libcore/option.rs:1000
Sep 10 20:52:51.794 INFO kablam!    9:     0x55879be4e3b3 - <core::option::Option<T>>::expect::h42fc426f08cb8c2b
Sep 10 20:52:51.795 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 10 20:52:51.795 INFO kablam!   10:     0x55879be4c59f - build_script_build::main::h2e4d0e0f2160dd12
Sep 10 20:52:51.795 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 10 20:52:51.795 INFO kablam!   11:     0x55879be4daef - std::rt::lang_start::{{closure}}::h24c916d4062fe51d
Sep 10 20:52:51.795 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 10 20:52:51.795 INFO kablam!   12:     0x55879be6fc72 - std::panicking::try::do_call::hd17f7bbbc80cfc74
Sep 10 20:52:51.795 INFO kablam!                                at libstd/rt.rs:59
Sep 10 20:52:51.795 INFO kablam!                                at libstd/panicking.rs:310
Sep 10 20:52:51.795 INFO kablam!   13:     0x55879be902a9 - __rust_maybe_catch_panic
Sep 10 20:52:51.795 INFO kablam!                                at libpanic_unwind/lib.rs:103
Sep 10 20:52:51.795 INFO kablam!   14:     0x55879be7af85 - std::rt::lang_start_internal::h8194e5e3064ac4bd
Sep 10 20:52:51.795 INFO kablam!                                at libstd/panicking.rs:289
Sep 10 20:52:51.795 INFO kablam!                                at libstd/panic.rs:392
Sep 10 20:52:51.795 INFO kablam!                                at libstd/rt.rs:58
Sep 10 20:52:51.795 INFO kablam!   15:     0x55879be4dac7 - std::rt::lang_start::h226ad0406733b0ac
Sep 10 20:52:51.795 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 10 20:52:51.795 INFO kablam!   16:     0x55879be4cd89 - main
Sep 10 20:52:51.795 INFO kablam!   17:     0x7fd1c4d0282f - __libc_start_main
Sep 10 20:52:51.795 INFO kablam!   18:     0x55879be46368 - _start
Sep 10 20:52:51.795 INFO kablam!   19:                0x0 - <unknown>
Sep 10 20:52:51.795 INFO kablam! 
Sep 10 20:52:51.796 INFO kablam! su: No module specific data is present
Sep 10 20:52:52.475 INFO running `"docker" "rm" "-f" "e5881fe48d824188f09343963d6b5178b7cc01967413b4b95f46f72ac45b6b81"`
Sep 10 20:52:52.595 INFO blam! e5881fe48d824188f09343963d6b5178b7cc01967413b4b95f46f72ac45b6b81