Sep 02 17:34:24.752 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#952c7dbfa2628309f557b367929ffc17af20b332 for pr-53851
Sep 02 17:34:24.752 INFO running: cargo +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets
Sep 02 17:34:24.752 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53851/try#952c7dbfa2628309f557b367929ffc17af20b332:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53851/worker-1/try#952c7dbfa2628309f557b367929ffc17af20b332:/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 +952c7dbfa2628309f557b367929ffc17af20b332-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 02 17:34:24.917 INFO blam! 96b0e14ad9a8483a8597dae0f087ee7a7329f34686c955a2a2e3e6d74eeeccc2
Sep 02 17:34:24.920 INFO running `"docker" "start" "-a" "96b0e14ad9a8483a8597dae0f087ee7a7329f34686c955a2a2e3e6d74eeeccc2"`
Sep 02 17:34:25.690 INFO kablam!    Compiling core_collections v0.3.20170409
Sep 02 17:34:27.075 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Sep 02 17:34:27.075 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-59c7323b6c88fe6e/build-script-build` (exit code: 101)
Sep 02 17:34:27.075 INFO kablam! --- stderr
Sep 02 17:34:27.075 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Sep 02 17:34:27.075 INFO kablam! stack backtrace:
Sep 02 17:34:27.075 INFO kablam!    0:     0x5591a1ee960e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h8608d381b52a1cc7
Sep 02 17:34:27.075 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Sep 02 17:34:27.075 INFO kablam!    1:     0x5591a1edb4b6 - std::sys_common::backtrace::print::hf96fbb6301ca8111
Sep 02 17:34:27.075 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Sep 02 17:34:27.075 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Sep 02 17:34:27.075 INFO kablam!    2:     0x5591a1ed9e2d - std::panicking::default_hook::{{closure}}::h2e8fa0d6ce9ebecc
Sep 02 17:34:27.075 INFO kablam!                                at libstd/panicking.rs:211
Sep 02 17:34:27.075 INFO kablam!    3:     0x5591a1ed9ba0 - std::panicking::default_hook::h3e385661c8d6b6f8
Sep 02 17:34:27.075 INFO kablam!                                at libstd/panicking.rs:227
Sep 02 17:34:27.076 INFO kablam!    4:     0x5591a1eda3ec - std::panicking::rust_panic_with_hook::h82448672ce6401e7
Sep 02 17:34:27.076 INFO kablam!                                at libstd/panicking.rs:477
Sep 02 17:34:27.076 INFO kablam!    5:     0x5591a1ed9fe9 - std::panicking::continue_panic_fmt::h7abacf9371d614d8
Sep 02 17:34:27.076 INFO kablam!                                at libstd/panicking.rs:391
Sep 02 17:34:27.076 INFO kablam!    6:     0x5591a1ed9ee5 - rust_begin_unwind
Sep 02 17:34:27.076 INFO kablam!                                at libstd/panicking.rs:326
Sep 02 17:34:27.076 INFO kablam!    7:     0x5591a1f2ab5b - core::panicking::panic_fmt::h6f207c73477c3893
Sep 02 17:34:27.076 INFO kablam!                                at libcore/panicking.rs:77
Sep 02 17:34:27.076 INFO kablam!    8:     0x5591a1f25f41 - core::option::expect_failed::ha9a9153012be4708
Sep 02 17:34:27.076 INFO kablam!                                at libcore/option.rs:1000
Sep 02 17:34:27.076 INFO kablam!    9:     0x5591a1eb93e3 - <core::option::Option<T>>::expect::he695f144153e5005
Sep 02 17:34:27.076 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Sep 02 17:34:27.076 INFO kablam!   10:     0x5591a1eb75c5 - build_script_build::main::h8ba705f443aabe34
Sep 02 17:34:27.076 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Sep 02 17:34:27.076 INFO kablam!   11:     0x5591a1eb8b1f - std::rt::lang_start::{{closure}}::ha0a56888fd7dd055
Sep 02 17:34:27.076 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 02 17:34:27.076 INFO kablam!   12:     0x5591a1ed9ed2 - std::panicking::try::do_call::he8eb7284c711bc58
Sep 02 17:34:27.076 INFO kablam!                                at libstd/rt.rs:59
Sep 02 17:34:27.076 INFO kablam!                                at libstd/panicking.rs:310
Sep 02 17:34:27.077 INFO kablam!   13:     0x5591a1efb7c9 - __rust_maybe_catch_panic
Sep 02 17:34:27.077 INFO kablam!                                at libpanic_unwind/lib.rs:103
Sep 02 17:34:27.077 INFO kablam!   14:     0x5591a1ee5215 - std::rt::lang_start_internal::h25421c11e0cff495
Sep 02 17:34:27.077 INFO kablam!                                at libstd/panicking.rs:289
Sep 02 17:34:27.077 INFO kablam!                                at libstd/panic.rs:392
Sep 02 17:34:27.077 INFO kablam!                                at libstd/rt.rs:58
Sep 02 17:34:27.077 INFO kablam!   15:     0x5591a1eb8af7 - std::rt::lang_start::he16231b926669add
Sep 02 17:34:27.077 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Sep 02 17:34:27.077 INFO kablam!   16:     0x5591a1eb7db9 - main
Sep 02 17:34:27.077 INFO kablam!   17:     0x7f700dbf982f - __libc_start_main
Sep 02 17:34:27.077 INFO kablam!   18:     0x5591a1eb1388 - _start
Sep 02 17:34:27.077 INFO kablam!   19:                0x0 - <unknown>
Sep 02 17:34:27.077 INFO kablam! 
Sep 02 17:34:27.077 INFO kablam! su: No module specific data is present
Sep 02 17:34:27.447 INFO running `"docker" "rm" "-f" "96b0e14ad9a8483a8597dae0f087ee7a7329f34686c955a2a2e3e6d74eeeccc2"`
Sep 02 17:34:27.539 INFO blam! 96b0e14ad9a8483a8597dae0f087ee7a7329f34686c955a2a2e3e6d74eeeccc2