Dec 15 00:55:21.211 INFO testing proptest-0.8.7 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 00:55:21.211 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 00:55:21.661 INFO [stdout] c57662616cc1145f0799ead79d414a0f7e0537139c26fd2668559bbc1faba1b6
Dec 15 00:55:21.664 INFO running `"docker" "start" "-a" "c57662616cc1145f0799ead79d414a0f7e0537139c26fd2668559bbc1faba1b6"`
Dec 15 00:55:23.287 INFO [stderr] usermod: no changes
Dec 15 00:55:23.466 INFO [stderr]    Compiling proptest v0.8.7 (/source)
Dec 15 00:55:32.991 INFO [stderr] warning: unused `core::result::Result` that must be used
Dec 15 00:55:32.991 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Dec 15 00:55:32.991 INFO [stderr]     |
Dec 15 00:55:32.991 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Dec 15 00:55:32.991 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 00:55:32.991 INFO [stderr]     |
Dec 15 00:55:32.992 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 15 00:55:32.992 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 00:55:32.992 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 15 00:55:32.992 INFO [stderr] 
Dec 15 00:55:41.339 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.02s
Dec 15 00:55:41.339 INFO [stderr] su: No module specific data is present
Dec 15 00:55:42.149 INFO running `"docker" "inspect" "c57662616cc1145f0799ead79d414a0f7e0537139c26fd2668559bbc1faba1b6"`
Dec 15 00:55:42.431 INFO running `"docker" "rm" "-f" "c57662616cc1145f0799ead79d414a0f7e0537139c26fd2668559bbc1faba1b6"`
Dec 15 00:55:42.838 INFO [stdout] c57662616cc1145f0799ead79d414a0f7e0537139c26fd2668559bbc1faba1b6
Dec 15 00:55:42.843 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 15 00:55:43.271 INFO [stdout] 864f8cbb1c6da1166985e726923b4ab8b6918ddde74f65cbe02a475ced9ee21b
Dec 15 00:55:43.279 INFO running `"docker" "start" "-a" "864f8cbb1c6da1166985e726923b4ab8b6918ddde74f65cbe02a475ced9ee21b"`
Dec 15 00:55:44.463 INFO [stderr] usermod: no changes
Dec 15 00:55:44.579 INFO [stderr]    Compiling proptest v0.8.7 (/source)
Dec 15 00:56:15.175 INFO [stderr] warning: unused `core::result::Result` that must be used
Dec 15 00:56:15.175 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Dec 15 00:56:15.175 INFO [stderr]     |
Dec 15 00:56:15.175 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Dec 15 00:56:15.175 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 00:56:15.175 INFO [stderr]     |
Dec 15 00:56:15.175 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 15 00:56:15.175 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 00:56:15.175 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 15 00:56:15.175 INFO [stderr] 
Dec 15 00:56:53.921 INFO [stderr] error: Could not compile `proptest`.
Dec 15 00:56:53.921 INFO [stderr] 
Dec 15 00:56:53.921 INFO [stderr] Caused by:
Dec 15 00:56:53.921 INFO [stderr]   process didn't exit successfully: `rustc --crate-name proptest src/lib.rs --color never --emit=dep-info,link -C debuginfo=2 --test --cfg 'feature="bit-set"' --cfg 'feature="byteorder"' --cfg 'feature="default"' --cfg 'feature="fork"' --cfg 'feature="num-traits"' --cfg 'feature="quick-error"' --cfg 'feature="rand"' --cfg 'feature="regex-syntax"' --cfg 'feature="rusty-fork"' --cfg 'feature="std"' --cfg 'feature="tempfile"' --cfg 'feature="timeout"' -C metadata=d826cdc07bc88df3 -C extra-filename=-d826cdc07bc88df3 --out-dir /target/debug/deps -L dependency=/target/debug/deps --extern bit_set=/target/debug/deps/libbit_set-978c380860fa9e98.rlib --extern bitflags=/target/debug/deps/libbitflags-5c4ed117a0398b5a.rlib --extern byteorder=/target/debug/deps/libbyteorder-6e5f2d6d76d0fd9d.rlib --extern lazy_static=/target/debug/deps/liblazy_static-a5a134b4bd788e5d.rlib --extern num_traits=/target/debug/deps/libnum_traits-7dd555c9a5ecf7e0.rlib --extern quick_error=/target/debug/deps/libquick_error-dffd2aa634700f66.rlib --extern rand=/target/debug/deps/librand-8ece45a80394ae00.rlib --extern regex=/target/debug/deps/libregex-10b98777814aeed9.rlib --extern regex_syntax=/target/debug/deps/libregex_syntax-aa385bcf872a05b7.rlib --extern rusty_fork=/target/debug/deps/librusty_fork-934418bbb2fc036b.rlib --extern tempfile=/target/debug/deps/libtempfile-ff175e965569c472.rlib --cap-lints=forbid` (signal: 9, SIGKILL: kill)
Dec 15 00:56:53.921 INFO [stderr] su: No module specific data is present
Dec 15 00:56:54.588 INFO running `"docker" "inspect" "864f8cbb1c6da1166985e726923b4ab8b6918ddde74f65cbe02a475ced9ee21b"`
Dec 15 00:56:54.684 INFO running `"docker" "rm" "-f" "864f8cbb1c6da1166985e726923b4ab8b6918ddde74f65cbe02a475ced9ee21b"`
Dec 15 00:56:54.780 INFO [stdout] 864f8cbb1c6da1166985e726923b4ab8b6918ddde74f65cbe02a475ced9ee21b