Nov 18 09:43:59.762 INFO testing hindley-milner-0.1.0 against try#2e026d6e5d7621634147ad4c8074f1d964dbb1be for pr-55982
Nov 18 09:43:59.762 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-0/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 18 09:44:00.057 INFO [stdout] cd4432583e903537cc0e76bcdbcf3d7fc9fbc32d200289222fe4ef14a7cf77e1
Nov 18 09:44:00.060 INFO running `"docker" "start" "-a" "cd4432583e903537cc0e76bcdbcf3d7fc9fbc32d200289222fe4ef14a7cf77e1"`
Nov 18 09:44:00.402 INFO [stderr] usermod: no changes
Nov 18 09:44:00.431 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Nov 18 09:44:00.931 INFO [stderr] warning: struct is never constructed: `Namer`
Nov 18 09:44:00.931 INFO [stderr]   --> src/lib.rs:77:1
Nov 18 09:44:00.931 INFO [stderr]    |
Nov 18 09:44:00.931 INFO [stderr] 77 | struct Namer {
Nov 18 09:44:00.931 INFO [stderr]    | ^^^^^^^^^^^^
Nov 18 09:44:00.931 INFO [stderr]    |
Nov 18 09:44:00.931 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 18 09:44:00.931 INFO [stderr] 
Nov 18 09:44:00.931 INFO [stderr] warning: method is never used: `next`
Nov 18 09:44:00.931 INFO [stderr]   --> src/lib.rs:83:5
Nov 18 09:44:00.931 INFO [stderr]    |
Nov 18 09:44:00.931 INFO [stderr] 83 |     fn next(&mut self) -> String {
Nov 18 09:44:00.931 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:00.931 INFO [stderr] 
Nov 18 09:44:00.931 INFO [stderr] warning: method is never used: `name`
Nov 18 09:44:00.931 INFO [stderr]   --> src/lib.rs:89:5
Nov 18 09:44:00.931 INFO [stderr]    |
Nov 18 09:44:00.931 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Nov 18 09:44:00.931 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:00.931 INFO [stderr] 
Nov 18 09:44:00.931 INFO [stderr] warning: method is never used: `id`
Nov 18 09:44:00.931 INFO [stderr]    --> src/lib.rs:124:5
Nov 18 09:44:00.931 INFO [stderr]     |
Nov 18 09:44:00.931 INFO [stderr] 124 |     fn id(&self) -> usize {
Nov 18 09:44:00.931 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:00.931 INFO [stderr] 
Nov 18 09:44:00.931 INFO [stderr] warning: method is never used: `as_string`
Nov 18 09:44:00.931 INFO [stderr]    --> src/lib.rs:146:5
Nov 18 09:44:00.931 INFO [stderr]     |
Nov 18 09:44:00.931 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Nov 18 09:44:00.931 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:00.932 INFO [stderr] 
Nov 18 09:44:00.932 INFO [stderr] warning: function is never used: `test_env`
Nov 18 09:44:00.932 INFO [stderr]    --> src/lib.rs:537:1
Nov 18 09:44:00.932 INFO [stderr]     |
Nov 18 09:44:00.932 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Nov 18 09:44:00.932 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:00.932 INFO [stderr] 
Nov 18 09:44:01.580 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
Nov 18 09:44:01.583 INFO [stderr] su: No module specific data is present
Nov 18 09:44:01.985 INFO running `"docker" "inspect" "cd4432583e903537cc0e76bcdbcf3d7fc9fbc32d200289222fe4ef14a7cf77e1"`
Nov 18 09:44:02.044 INFO running `"docker" "rm" "-f" "cd4432583e903537cc0e76bcdbcf3d7fc9fbc32d200289222fe4ef14a7cf77e1"`
Nov 18 09:44:02.115 INFO [stdout] cd4432583e903537cc0e76bcdbcf3d7fc9fbc32d200289222fe4ef14a7cf77e1
Nov 18 09:44:02.117 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-0/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-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"`
Nov 18 09:44:02.341 INFO [stdout] 4864eb861bcd794d97a0ab87e8919d67bba46c8e769df6b4476f0ccd0c9a9f22
Nov 18 09:44:02.348 INFO running `"docker" "start" "-a" "4864eb861bcd794d97a0ab87e8919d67bba46c8e769df6b4476f0ccd0c9a9f22"`
Nov 18 09:44:03.283 INFO [stderr] usermod: no changes
Nov 18 09:44:03.328 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Nov 18 09:44:04.630 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
Nov 18 09:44:04.632 INFO [stderr] su: No module specific data is present
Nov 18 09:44:04.915 INFO running `"docker" "inspect" "4864eb861bcd794d97a0ab87e8919d67bba46c8e769df6b4476f0ccd0c9a9f22"`
Nov 18 09:44:04.992 INFO running `"docker" "rm" "-f" "4864eb861bcd794d97a0ab87e8919d67bba46c8e769df6b4476f0ccd0c9a9f22"`
Nov 18 09:44:05.074 INFO [stdout] 4864eb861bcd794d97a0ab87e8919d67bba46c8e769df6b4476f0ccd0c9a9f22
Nov 18 09:44:05.076 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-0/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-55982/try#2e026d6e5d7621634147ad4c8074f1d964dbb1be:/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 +2e026d6e5d7621634147ad4c8074f1d964dbb1be-alt test --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"`
Nov 18 09:44:05.233 INFO [stdout] af558e0dac7d0c5d4487669bc2f93eb031d708258b38a2002b2c40a2e0064614
Nov 18 09:44:05.233 INFO running `"docker" "start" "-a" "af558e0dac7d0c5d4487669bc2f93eb031d708258b38a2002b2c40a2e0064614"`
Nov 18 09:44:05.626 INFO [stderr] usermod: no changes
Nov 18 09:44:05.652 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Nov 18 09:44:05.653 INFO [stderr]      Running /target/debug/deps/hindley_milner-4b0d8503f0621abe
Nov 18 09:44:05.654 INFO [stdout] 
Nov 18 09:44:05.654 INFO [stdout] running 9 tests
Nov 18 09:44:05.655 INFO [stdout] test test_composition ... ok
Nov 18 09:44:05.655 INFO [stdout] test test_factorial ... ok
Nov 18 09:44:05.655 INFO [stdout] test test_generic_nongeneric ... ok
Nov 18 09:44:05.659 INFO [stdout] test test_fun ... ok
Nov 18 09:44:05.659 INFO [stdout] test test_int ... ok
Nov 18 09:44:05.659 INFO [stdout] test test_mul ... ok
Nov 18 09:44:05.683 INFO [stdout] test test_pair ... ok
Nov 18 09:44:05.683 INFO [stdout] test test_recursive ... ok
Nov 18 09:44:05.683 INFO [stdout] test test_mismatch ... ok
Nov 18 09:44:05.683 INFO [stdout] 
Nov 18 09:44:05.683 INFO [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 18 09:44:05.683 INFO [stdout] 
Nov 18 09:44:05.685 INFO [stderr] su: No module specific data is present
Nov 18 09:44:05.941 INFO running `"docker" "inspect" "af558e0dac7d0c5d4487669bc2f93eb031d708258b38a2002b2c40a2e0064614"`
Nov 18 09:44:06.032 INFO running `"docker" "rm" "-f" "af558e0dac7d0c5d4487669bc2f93eb031d708258b38a2002b2c40a2e0064614"`
Nov 18 09:44:06.115 INFO [stdout] af558e0dac7d0c5d4487669bc2f93eb031d708258b38a2002b2c40a2e0064614