Nov 18 09:43:59.862 INFO testing hindley-milner-0.1.0 against master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c for pr-55982
Nov 18 09:43:59.862 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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 09:44:00.185 INFO [stdout] f6cbd068b535f67c0612387ba993b41bc58248d84345aa56676afa427c78028a
Nov 18 09:44:00.187 INFO running `"docker" "start" "-a" "f6cbd068b535f67c0612387ba993b41bc58248d84345aa56676afa427c78028a"`
Nov 18 09:44:00.498 INFO [stderr] usermod: no changes
Nov 18 09:44:00.522 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Nov 18 09:44:01.019 INFO [stderr] warning: struct is never constructed: `Namer`
Nov 18 09:44:01.019 INFO [stderr]   --> src/lib.rs:77:1
Nov 18 09:44:01.019 INFO [stderr]    |
Nov 18 09:44:01.019 INFO [stderr] 77 | struct Namer {
Nov 18 09:44:01.019 INFO [stderr]    | ^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr]    |
Nov 18 09:44:01.019 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.019 INFO [stderr] warning: method is never used: `next`
Nov 18 09:44:01.019 INFO [stderr]   --> src/lib.rs:83:5
Nov 18 09:44:01.019 INFO [stderr]    |
Nov 18 09:44:01.019 INFO [stderr] 83 |     fn next(&mut self) -> String {
Nov 18 09:44:01.019 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.019 INFO [stderr] warning: method is never used: `name`
Nov 18 09:44:01.019 INFO [stderr]   --> src/lib.rs:89:5
Nov 18 09:44:01.019 INFO [stderr]    |
Nov 18 09:44:01.019 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Nov 18 09:44:01.019 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.019 INFO [stderr] warning: method is never used: `id`
Nov 18 09:44:01.019 INFO [stderr]    --> src/lib.rs:124:5
Nov 18 09:44:01.019 INFO [stderr]     |
Nov 18 09:44:01.019 INFO [stderr] 124 |     fn id(&self) -> usize {
Nov 18 09:44:01.019 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.019 INFO [stderr] warning: method is never used: `as_string`
Nov 18 09:44:01.019 INFO [stderr]    --> src/lib.rs:146:5
Nov 18 09:44:01.019 INFO [stderr]     |
Nov 18 09:44:01.019 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Nov 18 09:44:01.019 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.019 INFO [stderr] warning: function is never used: `test_env`
Nov 18 09:44:01.019 INFO [stderr]    --> src/lib.rs:537:1
Nov 18 09:44:01.019 INFO [stderr]     |
Nov 18 09:44:01.019 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Nov 18 09:44:01.019 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 18 09:44:01.019 INFO [stderr] 
Nov 18 09:44:01.814 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
Nov 18 09:44:01.816 INFO [stderr] su: No module specific data is present
Nov 18 09:44:02.131 INFO running `"docker" "inspect" "f6cbd068b535f67c0612387ba993b41bc58248d84345aa56676afa427c78028a"`
Nov 18 09:44:02.224 INFO running `"docker" "rm" "-f" "f6cbd068b535f67c0612387ba993b41bc58248d84345aa56676afa427c78028a"`
Nov 18 09:44:02.314 INFO [stdout] f6cbd068b535f67c0612387ba993b41bc58248d84345aa56676afa427c78028a
Nov 18 09:44:02.316 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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 09:44:02.516 INFO [stdout] 3697d427fc58cc9a51d11c824edebce7169d44d6213a21aa3cc3f386e8304b9e
Nov 18 09:44:02.521 INFO running `"docker" "start" "-a" "3697d427fc58cc9a51d11c824edebce7169d44d6213a21aa3cc3f386e8304b9e"`
Nov 18 09:44:03.514 INFO [stderr] usermod: no changes
Nov 18 09:44:03.542 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Nov 18 09:44:04.824 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
Nov 18 09:44:04.826 INFO [stderr] su: No module specific data is present
Nov 18 09:44:05.124 INFO running `"docker" "inspect" "3697d427fc58cc9a51d11c824edebce7169d44d6213a21aa3cc3f386e8304b9e"`
Nov 18 09:44:05.185 INFO running `"docker" "rm" "-f" "3697d427fc58cc9a51d11c824edebce7169d44d6213a21aa3cc3f386e8304b9e"`
Nov 18 09:44:05.263 INFO [stdout] 3697d427fc58cc9a51d11c824edebce7169d44d6213a21aa3cc3f386e8304b9e
Nov 18 09:44:05.265 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55982/worker-4/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55982/master#6b9b97bd9b704f85f0184f7a213cc4d62bd9654c:/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 +6b9b97bd9b704f85f0184f7a213cc4d62bd9654c-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 09:44:05.502 INFO [stdout] fd6d58a386b61d020675ad325cfba64c1d97027d8e933776fa119759c359fecb
Nov 18 09:44:05.504 INFO running `"docker" "start" "-a" "fd6d58a386b61d020675ad325cfba64c1d97027d8e933776fa119759c359fecb"`
Nov 18 09:44:05.833 INFO [stderr] usermod: no changes
Nov 18 09:44:05.856 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Nov 18 09:44:05.856 INFO [stderr]      Running /target/debug/deps/hindley_milner-95b3803681fe0e68
Nov 18 09:44:05.857 INFO [stdout] 
Nov 18 09:44:05.857 INFO [stdout] running 9 tests
Nov 18 09:44:05.858 INFO [stdout] test test_composition ... ok
Nov 18 09:44:05.858 INFO [stdout] test test_int ... ok
Nov 18 09:44:05.858 INFO [stdout] test test_mul ... ok
Nov 18 09:44:05.858 INFO [stdout] test test_generic_nongeneric ... ok
Nov 18 09:44:05.858 INFO [stdout] test test_factorial ... ok
Nov 18 09:44:05.859 INFO [stdout] test test_fun ... ok
Nov 18 09:44:05.888 INFO [stdout] test test_pair ... ok
Nov 18 09:44:05.888 INFO [stdout] test test_mismatch ... ok
Nov 18 09:44:05.888 INFO [stdout] test test_recursive ... ok
Nov 18 09:44:05.888 INFO [stdout] 
Nov 18 09:44:05.888 INFO [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 18 09:44:05.888 INFO [stdout] 
Nov 18 09:44:05.891 INFO [stderr] su: No module specific data is present
Nov 18 09:44:06.139 INFO running `"docker" "inspect" "fd6d58a386b61d020675ad325cfba64c1d97027d8e933776fa119759c359fecb"`
Nov 18 09:44:06.275 INFO running `"docker" "rm" "-f" "fd6d58a386b61d020675ad325cfba64c1d97027d8e933776fa119759c359fecb"`
Nov 18 09:44:06.345 INFO [stdout] fd6d58a386b61d020675ad325cfba64c1d97027d8e933776fa119759c359fecb