Nov 28 20:20:30.019 INFO checking proptest-0.8.7 against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 20:20:30.020 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-1/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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 20:20:30.264 INFO [stdout] 45f9fadb387ee2be597d56f14a0ecc1e29707f01b04f3fac4192482e3eefb7c5
Nov 28 20:20:30.276 INFO running `"docker" "start" "-a" "45f9fadb387ee2be597d56f14a0ecc1e29707f01b04f3fac4192482e3eefb7c5"`
Nov 28 20:20:31.415 INFO [stderr] usermod: no changes
Nov 28 20:20:31.616 INFO [stderr]     Checking wait-timeout v0.1.5
Nov 28 20:20:31.620 INFO [stderr]     Checking rand v0.5.5
Nov 28 20:20:32.581 INFO [stderr]     Checking rusty-fork v0.2.1
Nov 28 20:20:36.376 INFO [stderr]     Checking proptest v0.8.7 (/source)
Nov 28 20:20:53.332 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 28 20:20:53.333 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 28 20:20:53.333 INFO [stderr]     |
Nov 28 20:20:53.334 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 28 20:20:53.335 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 20:20:53.335 INFO [stderr]     |
Nov 28 20:20:53.336 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 20:20:53.336 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 20:20:53.337 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 20:20:53.338 INFO [stderr] 
Nov 28 20:21:09.936 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 28 20:21:09.936 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 28 20:21:09.936 INFO [stderr]     |
Nov 28 20:21:09.936 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 28 20:21:09.936 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 20:21:09.936 INFO [stderr]     |
Nov 28 20:21:09.936 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 28 20:21:09.936 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 28 20:21:09.936 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 20:21:09.936 INFO [stderr] 
Nov 28 20:21:10.326 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.86s
Nov 28 20:21:10.341 INFO [stderr] su: No module specific data is present
Nov 28 20:21:11.106 INFO running `"docker" "inspect" "45f9fadb387ee2be597d56f14a0ecc1e29707f01b04f3fac4192482e3eefb7c5"`
Nov 28 20:21:11.459 INFO running `"docker" "rm" "-f" "45f9fadb387ee2be597d56f14a0ecc1e29707f01b04f3fac4192482e3eefb7c5"`
Nov 28 20:21:11.876 INFO [stdout] 45f9fadb387ee2be597d56f14a0ecc1e29707f01b04f3fac4192482e3eefb7c5