Dec 07 11:12:19.628 INFO testing hindley-milner-0.1.0 against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 07 11:12:19.628 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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"`
Dec 07 11:12:19.808 INFO [stdout] 8230d054c312267024374a87a38827b1c6ebc1118aacffbd10e65428f6842579
Dec 07 11:12:19.809 INFO running `"docker" "start" "-a" "8230d054c312267024374a87a38827b1c6ebc1118aacffbd10e65428f6842579"`
Dec 07 11:12:20.241 INFO [stderr] usermod: no changes
Dec 07 11:12:20.276 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 07 11:12:20.778 INFO [stderr] warning: struct is never constructed: `Namer`
Dec 07 11:12:20.778 INFO [stderr]   --> src/lib.rs:77:1
Dec 07 11:12:20.778 INFO [stderr]    |
Dec 07 11:12:20.778 INFO [stderr] 77 | struct Namer {
Dec 07 11:12:20.778 INFO [stderr]    | ^^^^^^^^^^^^
Dec 07 11:12:20.778 INFO [stderr]    |
Dec 07 11:12:20.778 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 07 11:12:20.778 INFO [stderr] 
Dec 07 11:12:20.778 INFO [stderr] warning: method is never used: `next`
Dec 07 11:12:20.778 INFO [stderr]   --> src/lib.rs:83:5
Dec 07 11:12:20.778 INFO [stderr]    |
Dec 07 11:12:20.778 INFO [stderr] 83 |     fn next(&mut self) -> String {
Dec 07 11:12:20.778 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.778 INFO [stderr] 
Dec 07 11:12:20.778 INFO [stderr] warning: method is never used: `name`
Dec 07 11:12:20.778 INFO [stderr]   --> src/lib.rs:89:5
Dec 07 11:12:20.778 INFO [stderr]    |
Dec 07 11:12:20.778 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Dec 07 11:12:20.778 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.778 INFO [stderr] 
Dec 07 11:12:20.778 INFO [stderr] warning: method is never used: `id`
Dec 07 11:12:20.778 INFO [stderr]    --> src/lib.rs:124:5
Dec 07 11:12:20.778 INFO [stderr]     |
Dec 07 11:12:20.778 INFO [stderr] 124 |     fn id(&self) -> usize {
Dec 07 11:12:20.778 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.778 INFO [stderr] 
Dec 07 11:12:20.778 INFO [stderr] warning: method is never used: `as_string`
Dec 07 11:12:20.778 INFO [stderr]    --> src/lib.rs:146:5
Dec 07 11:12:20.778 INFO [stderr]     |
Dec 07 11:12:20.778 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Dec 07 11:12:20.778 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.779 INFO [stderr] 
Dec 07 11:12:20.779 INFO [stderr] warning: function is never used: `test_env`
Dec 07 11:12:20.779 INFO [stderr]    --> src/lib.rs:537:1
Dec 07 11:12:20.779 INFO [stderr]     |
Dec 07 11:12:20.779 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Dec 07 11:12:20.779 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.779 INFO [stderr] 
Dec 07 11:12:21.477 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
Dec 07 11:12:21.484 INFO [stderr] su: No module specific data is present
Dec 07 11:12:21.768 INFO running `"docker" "inspect" "8230d054c312267024374a87a38827b1c6ebc1118aacffbd10e65428f6842579"`
Dec 07 11:12:21.882 INFO running `"docker" "rm" "-f" "8230d054c312267024374a87a38827b1c6ebc1118aacffbd10e65428f6842579"`
Dec 07 11:12:22.032 INFO [stdout] 8230d054c312267024374a87a38827b1c6ebc1118aacffbd10e65428f6842579
Dec 07 11:12:22.032 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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"`
Dec 07 11:12:22.278 INFO [stdout] 93e4a50e1b853db6cccb4164eb4141932785f307ba3c980ced2c16945f3302ae
Dec 07 11:12:22.282 INFO running `"docker" "start" "-a" "93e4a50e1b853db6cccb4164eb4141932785f307ba3c980ced2c16945f3302ae"`
Dec 07 11:12:23.392 INFO [stderr] usermod: no changes
Dec 07 11:12:23.420 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 07 11:12:25.329 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
Dec 07 11:12:25.331 INFO [stderr] su: No module specific data is present
Dec 07 11:12:25.629 INFO running `"docker" "inspect" "93e4a50e1b853db6cccb4164eb4141932785f307ba3c980ced2c16945f3302ae"`
Dec 07 11:12:25.710 INFO running `"docker" "rm" "-f" "93e4a50e1b853db6cccb4164eb4141932785f307ba3c980ced2c16945f3302ae"`
Dec 07 11:12:25.787 INFO [stdout] 93e4a50e1b853db6cccb4164eb4141932785f307ba3c980ced2c16945f3302ae
Dec 07 11:12:25.789 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-1/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-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"`
Dec 07 11:12:25.995 INFO [stdout] 537a67e3c0e031ab4b37a54dc1d678967320526960a71df5ae20cec23f093cb5
Dec 07 11:12:25.996 INFO running `"docker" "start" "-a" "537a67e3c0e031ab4b37a54dc1d678967320526960a71df5ae20cec23f093cb5"`
Dec 07 11:12:26.340 INFO [stderr] usermod: no changes
Dec 07 11:12:26.367 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 07 11:12:26.369 INFO [stderr]      Running /target/debug/deps/hindley_milner-706d2020f687ddcb
Dec 07 11:12:26.370 INFO [stdout] 
Dec 07 11:12:26.370 INFO [stdout] running 9 tests
Dec 07 11:12:26.371 INFO [stdout] test test_generic_nongeneric ... ok
Dec 07 11:12:26.371 INFO [stdout] test test_mul ... ok
Dec 07 11:12:26.371 INFO [stdout] test test_factorial ... ok
Dec 07 11:12:26.374 INFO [stdout] test test_fun ... ok
Dec 07 11:12:26.374 INFO [stdout] test test_int ... ok
Dec 07 11:12:26.374 INFO [stdout] test test_composition ... ok
Dec 07 11:12:26.400 INFO [stdout] test test_pair ... ok
Dec 07 11:12:26.400 INFO [stdout] test test_recursive ... ok
Dec 07 11:12:26.400 INFO [stdout] test test_mismatch ... ok
Dec 07 11:12:26.400 INFO [stdout] 
Dec 07 11:12:26.400 INFO [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 07 11:12:26.400 INFO [stdout] 
Dec 07 11:12:26.403 INFO [stderr] su: No module specific data is present
Dec 07 11:12:26.680 INFO running `"docker" "inspect" "537a67e3c0e031ab4b37a54dc1d678967320526960a71df5ae20cec23f093cb5"`
Dec 07 11:12:26.751 INFO running `"docker" "rm" "-f" "537a67e3c0e031ab4b37a54dc1d678967320526960a71df5ae20cec23f093cb5"`
Dec 07 11:12:26.835 INFO [stdout] 537a67e3c0e031ab4b37a54dc1d678967320526960a71df5ae20cec23f093cb5