Nov 01 13:49:48.554 INFO checking workerpool-1.1.1 against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Nov 01 13:49:48.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-0/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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 01 13:49:49.018 INFO blam! f843004fe4361da1c73aa00bd3a914e04e5aae0949a1ba74468edaea981bd166
Nov 01 13:49:49.019 INFO running `"docker" "start" "-a" "f843004fe4361da1c73aa00bd3a914e04e5aae0949a1ba74468edaea981bd166"`
Nov 01 13:49:50.967 INFO kablam! usermod: no changes
Nov 01 13:49:51.048 INFO kablam!     Checking workerpool v1.1.1 (/source)
Nov 01 13:49:52.789 INFO kablam! warning: unused arithmetic operation that must be used
Nov 01 13:49:52.789 INFO kablam!     --> src/lib.rs:1070:46
Nov 01 13:49:52.789 INFO kablam!      |
Nov 01 13:49:52.789 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Nov 01 13:49:52.789 INFO kablam!      |                                              ^^^^^
Nov 01 13:49:52.789 INFO kablam!      |
Nov 01 13:49:52.789 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Nov 01 13:49:52.791 INFO kablam! 
Nov 01 13:49:52.837 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
Nov 01 13:49:52.841 INFO kablam! su: No module specific data is present
Nov 01 13:49:54.074 INFO running `"docker" "rm" "-f" "f843004fe4361da1c73aa00bd3a914e04e5aae0949a1ba74468edaea981bd166"`
Nov 01 13:49:54.349 INFO blam! f843004fe4361da1c73aa00bd3a914e04e5aae0949a1ba74468edaea981bd166