Aug 30 20:55:39.777 INFO checking core_rustc-serialize-0.3.20-v0.3.19patch1 against try#bc5a74802bb3ffc82f51ef04bca58d64220124c4 for pr-53699
Aug 30 20:55:39.777 INFO running: cargo +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets
Aug 30 20:55:39.777 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53699/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53699/worker-1/try#bc5a74802bb3ffc82f51ef04bca58d64220124c4:/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 +bc5a74802bb3ffc82f51ef04bca58d64220124c4-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 20:55:39.929 INFO blam! b50a56dbb1da1189ec53dee0b6f6f9da28fcfcdc0c3138f791ba7e73636cacd3
Aug 30 20:55:39.931 INFO running `"docker" "start" "-a" "b50a56dbb1da1189ec53dee0b6f6f9da28fcfcdc0c3138f791ba7e73636cacd3"`
Aug 30 20:55:40.539 INFO kablam!    Compiling core_collections v0.3.20170409
Aug 30 20:55:42.004 INFO kablam! error: failed to run custom build command for `core_collections v0.3.20170409`
Aug 30 20:55:42.005 INFO kablam! process didn't exit successfully: `/target/debug/build/core_collections-7e65a50d61a11392/build-script-build` (exit code: 101)
Aug 30 20:55:42.005 INFO kablam! --- stderr
Aug 30 20:55:42.005 INFO kablam! thread 'main' panicked at 'Unknown compiler version, upgrade core_collections?', libcore/option.rs:1000:5
Aug 30 20:55:42.005 INFO kablam! stack backtrace:
Aug 30 20:55:42.005 INFO kablam!    0:     0x5571b8ead60e - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h1e2c8a158f82a771
Aug 30 20:55:42.005 INFO kablam!                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Aug 30 20:55:42.005 INFO kablam!    1:     0x5571b8e9f4b6 - std::sys_common::backtrace::print::h20354399b6248400
Aug 30 20:55:42.005 INFO kablam!                                at libstd/sys_common/backtrace.rs:71
Aug 30 20:55:42.005 INFO kablam!                                at libstd/sys_common/backtrace.rs:59
Aug 30 20:55:42.005 INFO kablam!    2:     0x5571b8e9de2d - std::panicking::default_hook::{{closure}}::h27a2dbd1311dde15
Aug 30 20:55:42.005 INFO kablam!                                at libstd/panicking.rs:211
Aug 30 20:55:42.005 INFO kablam!    3:     0x5571b8e9dba0 - std::panicking::default_hook::hbb219006758dbd2e
Aug 30 20:55:42.005 INFO kablam!                                at libstd/panicking.rs:227
Aug 30 20:55:42.005 INFO kablam!    4:     0x5571b8e9e3ec - std::panicking::rust_panic_with_hook::h54ff8ddef2df49c5
Aug 30 20:55:42.005 INFO kablam!                                at libstd/panicking.rs:476
Aug 30 20:55:42.005 INFO kablam!    5:     0x5571b8e9dfe9 - std::panicking::continue_panic_fmt::hd3ab0516fdd5f4c7
Aug 30 20:55:42.005 INFO kablam!                                at libstd/panicking.rs:390
Aug 30 20:55:42.005 INFO kablam!    6:     0x5571b8e9dee5 - rust_begin_unwind
Aug 30 20:55:42.005 INFO kablam!                                at libstd/panicking.rs:325
Aug 30 20:55:42.005 INFO kablam!    7:     0x5571b8eeeb6b - core::panicking::panic_fmt::h8c43e8dbd135b6a8
Aug 30 20:55:42.006 INFO kablam!                                at libcore/panicking.rs:77
Aug 30 20:55:42.006 INFO kablam!    8:     0x5571b8ee9f61 - core::option::expect_failed::h7d0c0b9a368038ea
Aug 30 20:55:42.006 INFO kablam!                                at libcore/option.rs:1000
Aug 30 20:55:42.006 INFO kablam!    9:     0x5571b8e7d3e3 - <core::option::Option<T>>::expect::hce27a88184fadaef
Aug 30 20:55:42.006 INFO kablam!                                at /checkout/src/libcore/option.rs:312
Aug 30 20:55:42.006 INFO kablam!   10:     0x5571b8e7b5c5 - build_script_build::main::hcb192749ad70ca62
Aug 30 20:55:42.006 INFO kablam!                                at /cargo-home/registry/src/github.com-1ecc6299db9ec823/core_collections-0.3.20170409/build.rs:48
Aug 30 20:55:42.006 INFO kablam!   11:     0x5571b8e7cb1f - std::rt::lang_start::{{closure}}::h23a67dbacc7049ce
Aug 30 20:55:42.006 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Aug 30 20:55:42.006 INFO kablam!   12:     0x5571b8e9ded2 - std::panicking::try::do_call::he8e7cb1df85bccd2
Aug 30 20:55:42.006 INFO kablam!                                at libstd/rt.rs:59
Aug 30 20:55:42.006 INFO kablam!                                at libstd/panicking.rs:310
Aug 30 20:55:42.006 INFO kablam!   13:     0x5571b8ebf569 - __rust_maybe_catch_panic
Aug 30 20:55:42.006 INFO kablam!                                at libpanic_unwind/lib.rs:102
Aug 30 20:55:42.006 INFO kablam!   14:     0x5571b8ea9225 - std::rt::lang_start_internal::h3de9d74037683c14
Aug 30 20:55:42.006 INFO kablam!                                at libstd/panicking.rs:289
Aug 30 20:55:42.006 INFO kablam!                                at libstd/panic.rs:392
Aug 30 20:55:42.006 INFO kablam!                                at libstd/rt.rs:58
Aug 30 20:55:42.007 INFO kablam!   15:     0x5571b8e7caf7 - std::rt::lang_start::h6537b9cc035bcf6b
Aug 30 20:55:42.007 INFO kablam!                                at /checkout/src/libstd/rt.rs:74
Aug 30 20:55:42.007 INFO kablam!   16:     0x5571b8e7bdb9 - main
Aug 30 20:55:42.007 INFO kablam!   17:     0x7fa497f0e82f - __libc_start_main
Aug 30 20:55:42.007 INFO kablam!   18:     0x5571b8e75388 - _start
Aug 30 20:55:42.007 INFO kablam!   19:                0x0 - <unknown>
Aug 30 20:55:42.007 INFO kablam! 
Aug 30 20:55:42.007 INFO kablam! su: No module specific data is present
Aug 30 20:55:42.379 INFO running `"docker" "rm" "-f" "b50a56dbb1da1189ec53dee0b6f6f9da28fcfcdc0c3138f791ba7e73636cacd3"`
Aug 30 20:55:42.470 INFO blam! b50a56dbb1da1189ec53dee0b6f6f9da28fcfcdc0c3138f791ba7e73636cacd3