Nov 30 17:47:43.691 INFO checking proptest-0.8.7 against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 30 17:47:43.691 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-2/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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 30 17:47:44.111 INFO [stdout] 1caa022472a2bbfd7e28c6b137971d6d22c02e70333b173667b14a2a6820e61c
Nov 30 17:47:44.120 INFO running `"docker" "start" "-a" "1caa022472a2bbfd7e28c6b137971d6d22c02e70333b173667b14a2a6820e61c"`
Nov 30 17:47:45.308 INFO [stderr] usermod: no changes
Nov 30 17:47:45.501 INFO [stderr]     Checking proptest v0.8.7 (/source)
Nov 30 17:47:59.456 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 17:47:59.456 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 30 17:47:59.456 INFO [stderr]     |
Nov 30 17:47:59.456 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 30 17:47:59.456 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 17:47:59.456 INFO [stderr]     |
Nov 30 17:47:59.456 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 30 17:47:59.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 17:47:59.456 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 30 17:47:59.456 INFO [stderr] 
Nov 30 17:48:15.234 INFO [stderr] warning: unused `core::result::Result` that must be used
Nov 30 17:48:15.234 INFO [stderr]    --> src/test_runner/failure_persistence/file.rs:308:5
Nov 30 17:48:15.234 INFO [stderr]     |
Nov 30 17:48:15.234 INFO [stderr] 308 |     write!(buf, "{}", format_basic_seed_line(seed));
Nov 30 17:48:15.234 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 30 17:48:15.234 INFO [stderr]     |
Nov 30 17:48:15.234 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Nov 30 17:48:15.234 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Nov 30 17:48:15.234 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 30 17:48:15.234 INFO [stderr] 
Nov 30 17:48:15.665 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.31s
Nov 30 17:48:15.672 INFO [stderr] su: No module specific data is present
Nov 30 17:48:16.830 INFO running `"docker" "inspect" "1caa022472a2bbfd7e28c6b137971d6d22c02e70333b173667b14a2a6820e61c"`
Nov 30 17:48:17.184 INFO running `"docker" "rm" "-f" "1caa022472a2bbfd7e28c6b137971d6d22c02e70333b173667b14a2a6820e61c"`
Nov 30 17:48:17.468 INFO [stdout] 1caa022472a2bbfd7e28c6b137971d6d22c02e70333b173667b14a2a6820e61c