Aug 30 21:15:20.959 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 30 21:15:20.959 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 30 21:15:20.959 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-1/try#2d477f9981361618ac78253c28051a66b6cea125:/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 +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 21:15:21.125 INFO blam! e32f2f4102c686166797a7ffb9ad216f645e86049f90511d15bd7917adf13ba2
Aug 30 21:15:21.127 INFO running `"docker" "start" "-a" "e32f2f4102c686166797a7ffb9ad216f645e86049f90511d15bd7917adf13ba2"`
Aug 30 21:15:21.775 INFO kablam!    Compiling core_collections v0.3.20170409
Aug 30 21:15:23.104 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Aug 30 21:15:23.104 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-b227c0bebbc6d090/build-script-build` (exit code: 101)
Aug 30 21:15:23.104 INFO kablam! --- stderr
Aug 30 21:15:23.104 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Aug 30 21:15:23.104 INFO kablam! stack backtrace:
Aug 30 21:15:23.104 INFO kablam!    0:     0x564f9d6ec5fe - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h8f71f310d118facb
Aug 30 21:15:23.104 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Aug 30 21:15:23.104 INFO kablam!    1:     0x564f9d6de4b6 - std::sys_common::backtrace::print::hfdcfd1f104fe4840
Aug 30 21:15:23.104 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Aug 30 21:15:23.104 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Aug 30 21:15:23.104 INFO kablam!    2:     0x564f9d6dce2d - std::panicking::default_hook::{{closure}}::heac6c2569094f14c
Aug 30 21:15:23.104 INFO kablam!                                at libstd/panicking.rs:211
Aug 30 21:15:23.104 INFO kablam!    3:     0x564f9d6dcba0 - std::panicking::default_hook::h172730ec656eb3f4
Aug 30 21:15:23.104 INFO kablam!                                at libstd/panicking.rs:227
Aug 30 21:15:23.104 INFO kablam!    4:     0x564f9d6dd3ec - std::panicking::rust_panic_with_hook::h4baee0ff6b4c8d5f
Aug 30 21:15:23.104 INFO kablam!                                at libstd/panicking.rs:477
Aug 30 21:15:23.105 INFO kablam!    5:     0x564f9d6dcfe9 - std::panicking::continue_panic_fmt::he85e6162abe63ff8
Aug 30 21:15:23.105 INFO kablam!                                at libstd/panicking.rs:391
Aug 30 21:15:23.105 INFO kablam!    6:     0x564f9d6dcee5 - rust_begin_unwind
Aug 30 21:15:23.105 INFO kablam!                                at libstd/panicking.rs:326
Aug 30 21:15:23.105 INFO kablam!    7:     0x564f9d72db7b - core::panicking::panic_fmt::h15874dc89aa467a9
Aug 30 21:15:23.105 INFO kablam!                                at libcore/panicking.rs:77
Aug 30 21:15:23.105 INFO kablam!    8:     0x564f9d728f71 - core::option::expect_failed::h7310f1dc14a45fa1
Aug 30 21:15:23.105 INFO kablam!                                at libcore/option.rs:1000
Aug 30 21:15:23.105 INFO kablam!    9:     0x564f9d6bc3e3 - <core::option::Option<T>>::expect::hc1e1c587e51d245b
Aug 30 21:15:23.105 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Aug 30 21:15:23.105 INFO kablam!   10:     0x564f9d6ba5c5 - build_script_build::main::h172120ef27457c81
Aug 30 21:15:23.105 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Aug 30 21:15:23.105 INFO kablam!   11:     0x564f9d6bbb1f - std::rt::lang_start::{{closure}}::h19d4f0f7a9f311f5
Aug 30 21:15:23.105 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Aug 30 21:15:23.105 INFO kablam!   12:     0x564f9d6dced2 - std::panicking::try::do_call::h09d1819b0274af73
Aug 30 21:15:23.105 INFO kablam!                                at libstd/rt.rs:59
Aug 30 21:15:23.105 INFO kablam!                                at libstd/panicking.rs:310
Aug 30 21:15:23.105 INFO kablam!   13:     0x564f9d6feaf9 - __rust_maybe_catch_panic
Aug 30 21:15:23.105 INFO kablam!                                at libpanic_unwind/lib.rs:102
Aug 30 21:15:23.105 INFO kablam!   14:     0x564f9d6e8225 - std::rt::lang_start_internal::hf36d29744825ff5e
Aug 30 21:15:23.105 INFO kablam!                                at libstd/panicking.rs:289
Aug 30 21:15:23.105 INFO kablam!                                at libstd/panic.rs:392
Aug 30 21:15:23.105 INFO kablam!                                at libstd/rt.rs:58
Aug 30 21:15:23.105 INFO kablam!   15:     0x564f9d6bbaf7 - std::rt::lang_start::h5053fe3082fe5b25
Aug 30 21:15:23.105 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Aug 30 21:15:23.105 INFO kablam!   16:     0x564f9d6badb9 - main
Aug 30 21:15:23.106 INFO kablam!   17:     0x7fbf5853b82f - __libc_start_main
Aug 30 21:15:23.106 INFO kablam!   18:     0x564f9d6b4388 - _start
Aug 30 21:15:23.106 INFO kablam!   19:                0x0 - <unknown>
Aug 30 21:15:23.106 INFO kablam! 
Aug 30 21:15:23.107 INFO kablam! su: No module specific data is present
Aug 30 21:15:23.655 INFO running `"docker" "rm" "-f" "e32f2f4102c686166797a7ffb9ad216f645e86049f90511d15bd7917adf13ba2"`
Aug 30 21:15:23.738 INFO blam! e32f2f4102c686166797a7ffb9ad216f645e86049f90511d15bd7917adf13ba2