Dec 07 11:12:19.528 INFO testing hindley-milner-0.1.0 against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 07 11:12:19.528 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 11:12:19.748 INFO [stdout] c2b9fc6677eecc526ab130bd5d7d3172ef034338083e0a89e2e3efbf2e3a321e
Dec 07 11:12:19.749 INFO running `"docker" "start" "-a" "c2b9fc6677eecc526ab130bd5d7d3172ef034338083e0a89e2e3efbf2e3a321e"`
Dec 07 11:12:20.168 INFO [stderr] usermod: no changes
Dec 07 11:12:20.200 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 07 11:12:20.755 INFO [stderr] warning: struct is never constructed: `Namer`
Dec 07 11:12:20.755 INFO [stderr]   --> src/lib.rs:77:1
Dec 07 11:12:20.755 INFO [stderr]    |
Dec 07 11:12:20.755 INFO [stderr] 77 | struct Namer {
Dec 07 11:12:20.755 INFO [stderr]    | ^^^^^^^^^^^^
Dec 07 11:12:20.755 INFO [stderr]    |
Dec 07 11:12:20.755 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 07 11:12:20.755 INFO [stderr] 
Dec 07 11:12:20.755 INFO [stderr] warning: method is never used: `next`
Dec 07 11:12:20.755 INFO [stderr]   --> src/lib.rs:83:5
Dec 07 11:12:20.755 INFO [stderr]    |
Dec 07 11:12:20.755 INFO [stderr] 83 |     fn next(&mut self) -> String {
Dec 07 11:12:20.755 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.755 INFO [stderr] 
Dec 07 11:12:20.755 INFO [stderr] warning: method is never used: `name`
Dec 07 11:12:20.755 INFO [stderr]   --> src/lib.rs:89:5
Dec 07 11:12:20.755 INFO [stderr]    |
Dec 07 11:12:20.755 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Dec 07 11:12:20.755 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.755 INFO [stderr] 
Dec 07 11:12:20.755 INFO [stderr] warning: method is never used: `id`
Dec 07 11:12:20.755 INFO [stderr]    --> src/lib.rs:124:5
Dec 07 11:12:20.755 INFO [stderr]     |
Dec 07 11:12:20.755 INFO [stderr] 124 |     fn id(&self) -> usize {
Dec 07 11:12:20.755 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.755 INFO [stderr] 
Dec 07 11:12:20.755 INFO [stderr] warning: method is never used: `as_string`
Dec 07 11:12:20.755 INFO [stderr]    --> src/lib.rs:146:5
Dec 07 11:12:20.755 INFO [stderr]     |
Dec 07 11:12:20.755 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Dec 07 11:12:20.755 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.755 INFO [stderr] 
Dec 07 11:12:20.755 INFO [stderr] warning: function is never used: `test_env`
Dec 07 11:12:20.755 INFO [stderr]    --> src/lib.rs:537:1
Dec 07 11:12:20.755 INFO [stderr]     |
Dec 07 11:12:20.756 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Dec 07 11:12:20.756 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 07 11:12:20.756 INFO [stderr] 
Dec 07 11:12:21.530 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.34s
Dec 07 11:12:21.533 INFO [stderr] su: No module specific data is present
Dec 07 11:12:21.772 INFO running `"docker" "inspect" "c2b9fc6677eecc526ab130bd5d7d3172ef034338083e0a89e2e3efbf2e3a321e"`
Dec 07 11:12:21.846 INFO running `"docker" "rm" "-f" "c2b9fc6677eecc526ab130bd5d7d3172ef034338083e0a89e2e3efbf2e3a321e"`
Dec 07 11:12:21.956 INFO [stdout] c2b9fc6677eecc526ab130bd5d7d3172ef034338083e0a89e2e3efbf2e3a321e
Dec 07 11:12:21.962 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 11:12:22.350 INFO [stdout] 14fe452cdb9f0d151bf23b911a5372925174ec2b56e6b3e051e5aabe521eccb2
Dec 07 11:12:22.350 INFO running `"docker" "start" "-a" "14fe452cdb9f0d151bf23b911a5372925174ec2b56e6b3e051e5aabe521eccb2"`
Dec 07 11:12:23.303 INFO [stderr] usermod: no changes
Dec 07 11:12:23.337 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 07 11:12:25.282 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.96s
Dec 07 11:12:25.283 INFO [stderr] su: No module specific data is present
Dec 07 11:12:25.629 INFO running `"docker" "inspect" "14fe452cdb9f0d151bf23b911a5372925174ec2b56e6b3e051e5aabe521eccb2"`
Dec 07 11:12:25.701 INFO running `"docker" "rm" "-f" "14fe452cdb9f0d151bf23b911a5372925174ec2b56e6b3e051e5aabe521eccb2"`
Dec 07 11:12:25.797 INFO [stdout] 14fe452cdb9f0d151bf23b911a5372925174ec2b56e6b3e051e5aabe521eccb2
Dec 07 11:12:25.798 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 11:12:26.034 INFO [stdout] d472dd92ba1b75c39ead793654fcb434b19caee573905cb3305c6f3fc7342853
Dec 07 11:12:26.036 INFO running `"docker" "start" "-a" "d472dd92ba1b75c39ead793654fcb434b19caee573905cb3305c6f3fc7342853"`
Dec 07 11:12:26.332 INFO [stderr] usermod: no changes
Dec 07 11:12:26.373 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 07 11:12:26.374 INFO [stderr]      Running /target/debug/deps/hindley_milner-450a888f84466714
Dec 07 11:12:26.375 INFO [stdout] 
Dec 07 11:12:26.375 INFO [stdout] running 9 tests
Dec 07 11:12:26.376 INFO [stdout] test test_composition ... ok
Dec 07 11:12:26.376 INFO [stdout] test test_fun ... ok
Dec 07 11:12:26.376 INFO [stdout] test test_mul ... ok
Dec 07 11:12:26.377 INFO [stdout] test test_int ... ok
Dec 07 11:12:26.377 INFO [stdout] test test_generic_nongeneric ... ok
Dec 07 11:12:26.383 INFO [stdout] test test_factorial ... ok
Dec 07 11:12:26.413 INFO [stdout] test test_pair ... ok
Dec 07 11:12:26.413 INFO [stdout] test test_recursive ... ok
Dec 07 11:12:26.413 INFO [stdout] test test_mismatch ... ok
Dec 07 11:12:26.413 INFO [stdout] 
Dec 07 11:12:26.413 INFO [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 07 11:12:26.413 INFO [stdout] 
Dec 07 11:12:26.417 INFO [stderr] su: No module specific data is present
Dec 07 11:12:26.666 INFO running `"docker" "inspect" "d472dd92ba1b75c39ead793654fcb434b19caee573905cb3305c6f3fc7342853"`
Dec 07 11:12:26.745 INFO running `"docker" "rm" "-f" "d472dd92ba1b75c39ead793654fcb434b19caee573905cb3305c6f3fc7342853"`
Dec 07 11:12:26.828 INFO [stdout] d472dd92ba1b75c39ead793654fcb434b19caee573905cb3305c6f3fc7342853