Nov 28 20:20:30.188 INFO checking proptest-0.8.7 against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 20:20:30.188 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-6/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/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 +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-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"`
Nov 28 20:20:30.353 INFO [stdout] 0f64ab1a378425cd4d01e7c76117e3c9555d502b00c3bf517e1bbff8c80d0d7d
Nov 28 20:20:30.370 INFO running `"docker" "start" "-a" "0f64ab1a378425cd4d01e7c76117e3c9555d502b00c3bf517e1bbff8c80d0d7d"`
Nov 28 20:20:32.211 INFO [stderr] usermod: no changes
Nov 28 20:20:32.439 INFO [stderr]     Checking rand v0.5.5
Nov 28 20:20:36.096 INFO [stderr]     Checking proptest v0.8.7 (/source)
Nov 28 20:20:52.424 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 28 20:20:52.426 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 28 20:20:52.426 INFO [stderr]     |
Nov 28 20:20:52.427 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 28 20:20:52.428 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 20:20:52.428 INFO [stderr]     |
Nov 28 20:20:52.429 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 20:20:52.429 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 20:20:52.430 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)
Nov 28 20:20:52.431 INFO [stderr] 
Nov 28 20:21:08.894 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 28 20:21:08.895 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 28 20:21:08.896 INFO [stderr]     |
Nov 28 20:21:08.897 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 28 20:21:08.897 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 20:21:08.897 INFO [stderr]     |
Nov 28 20:21:08.897 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 20:21:08.898 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 20:21:08.898 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)
Nov 28 20:21:08.898 INFO [stderr] 
Nov 28 20:21:09.370 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.13s
Nov 28 20:21:09.379 INFO [stderr] su: No module specific data is present
Nov 28 20:21:10.520 INFO running `"docker" "inspect" "0f64ab1a378425cd4d01e7c76117e3c9555d502b00c3bf517e1bbff8c80d0d7d"`
Nov 28 20:21:10.892 INFO running `"docker" "rm" "-f" "0f64ab1a378425cd4d01e7c76117e3c9555d502b00c3bf517e1bbff8c80d0d7d"`
Nov 28 20:21:11.106 INFO [stdout] 0f64ab1a378425cd4d01e7c76117e3c9555d502b00c3bf517e1bbff8c80d0d7d