Dec 15 08:53:21.813 INFO testing hindley-milner-0.1.0 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 15 08:53:21.813 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 15 08:53:22.087 INFO [stdout] 8a2e24aa38d02247776c6751b7a1ea19c0b506125a48a5d62cdf1bb9a4849b9c
Dec 15 08:53:22.093 INFO running `"docker" "start" "-a" "8a2e24aa38d02247776c6751b7a1ea19c0b506125a48a5d62cdf1bb9a4849b9c"`
Dec 15 08:53:23.784 INFO [stderr] usermod: no changes
Dec 15 08:53:23.827 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 15 08:53:24.354 INFO [stderr] warning: struct is never constructed: `Namer`
Dec 15 08:53:24.354 INFO [stderr]   --> src/lib.rs:77:1
Dec 15 08:53:24.354 INFO [stderr]    |
Dec 15 08:53:24.354 INFO [stderr] 77 | struct Namer {
Dec 15 08:53:24.354 INFO [stderr]    | ^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr]    |
Dec 15 08:53:24.354 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.354 INFO [stderr] warning: method is never used: `next`
Dec 15 08:53:24.354 INFO [stderr]   --> src/lib.rs:83:5
Dec 15 08:53:24.354 INFO [stderr]    |
Dec 15 08:53:24.354 INFO [stderr] 83 |     fn next(&mut self) -> String {
Dec 15 08:53:24.354 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.354 INFO [stderr] warning: method is never used: `name`
Dec 15 08:53:24.354 INFO [stderr]   --> src/lib.rs:89:5
Dec 15 08:53:24.354 INFO [stderr]    |
Dec 15 08:53:24.354 INFO [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
Dec 15 08:53:24.354 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.354 INFO [stderr] warning: method is never used: `id`
Dec 15 08:53:24.354 INFO [stderr]    --> src/lib.rs:124:5
Dec 15 08:53:24.354 INFO [stderr]     |
Dec 15 08:53:24.354 INFO [stderr] 124 |     fn id(&self) -> usize {
Dec 15 08:53:24.354 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.354 INFO [stderr] warning: method is never used: `as_string`
Dec 15 08:53:24.354 INFO [stderr]    --> src/lib.rs:146:5
Dec 15 08:53:24.354 INFO [stderr]     |
Dec 15 08:53:24.354 INFO [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
Dec 15 08:53:24.354 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.354 INFO [stderr] warning: function is never used: `test_env`
Dec 15 08:53:24.354 INFO [stderr]    --> src/lib.rs:537:1
Dec 15 08:53:24.354 INFO [stderr]     |
Dec 15 08:53:24.354 INFO [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
Dec 15 08:53:24.354 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 08:53:24.354 INFO [stderr] 
Dec 15 08:53:24.849 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
Dec 15 08:53:24.852 INFO [stderr] su: No module specific data is present
Dec 15 08:53:25.319 INFO running `"docker" "inspect" "8a2e24aa38d02247776c6751b7a1ea19c0b506125a48a5d62cdf1bb9a4849b9c"`
Dec 15 08:53:25.409 INFO running `"docker" "rm" "-f" "8a2e24aa38d02247776c6751b7a1ea19c0b506125a48a5d62cdf1bb9a4849b9c"`
Dec 15 08:53:25.503 INFO [stdout] 8a2e24aa38d02247776c6751b7a1ea19c0b506125a48a5d62cdf1bb9a4849b9c
Dec 15 08:53:25.508 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 15 08:53:25.873 INFO [stdout] 2b25bd1f7b3c873a67ca2651dafde1e74c6ed66ebef1e97a33e675add59ca212
Dec 15 08:53:25.875 INFO running `"docker" "start" "-a" "2b25bd1f7b3c873a67ca2651dafde1e74c6ed66ebef1e97a33e675add59ca212"`
Dec 15 08:53:26.391 INFO [stderr] usermod: no changes
Dec 15 08:53:26.417 INFO [stderr]    Compiling hindley-milner v0.1.0 (/source)
Dec 15 08:53:27.819 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
Dec 15 08:53:27.819 INFO [stderr] su: No module specific data is present
Dec 15 08:53:28.301 INFO running `"docker" "inspect" "2b25bd1f7b3c873a67ca2651dafde1e74c6ed66ebef1e97a33e675add59ca212"`
Dec 15 08:53:28.379 INFO running `"docker" "rm" "-f" "2b25bd1f7b3c873a67ca2651dafde1e74c6ed66ebef1e97a33e675add59ca212"`
Dec 15 08:53:28.457 INFO [stdout] 2b25bd1f7b3c873a67ca2651dafde1e74c6ed66ebef1e97a33e675add59ca212
Dec 15 08:53:28.461 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 15 08:53:28.650 INFO [stdout] d9cd53865a507f77f924569157362dc5590849d98497f721d9dd3a07f8054b11
Dec 15 08:53:28.652 INFO running `"docker" "start" "-a" "d9cd53865a507f77f924569157362dc5590849d98497f721d9dd3a07f8054b11"`
Dec 15 08:53:29.053 INFO [stderr] usermod: no changes
Dec 15 08:53:29.107 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 15 08:53:29.108 INFO [stderr]      Running /target/debug/deps/hindley_milner-0fdafe7b52cd9009
Dec 15 08:53:29.111 INFO [stdout] 
Dec 15 08:53:29.111 INFO [stdout] running 9 tests
Dec 15 08:53:29.147 INFO [stdout] test test_generic_nongeneric ... ok
Dec 15 08:53:29.147 INFO [stdout] test test_fun ... ok
Dec 15 08:53:29.148 INFO [stdout] test test_composition ... ok
Dec 15 08:53:29.148 INFO [stdout] test test_mul ... ok
Dec 15 08:53:29.148 INFO [stdout] test test_int ... ok
Dec 15 08:53:29.148 INFO [stdout] test test_factorial ... ok
Dec 15 08:53:29.186 INFO [stdout] test test_pair ... ok
Dec 15 08:53:29.186 INFO [stdout] test test_mismatch ... ok
Dec 15 08:53:29.191 INFO [stderr] su: No module specific data is present
Dec 15 08:53:29.191 INFO [stdout] test test_recursive ... ok
Dec 15 08:53:29.191 INFO [stdout] 
Dec 15 08:53:29.191 INFO [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 15 08:53:29.191 INFO [stdout] 
Dec 15 08:53:29.556 INFO running `"docker" "inspect" "d9cd53865a507f77f924569157362dc5590849d98497f721d9dd3a07f8054b11"`
Dec 15 08:53:29.805 INFO running `"docker" "rm" "-f" "d9cd53865a507f77f924569157362dc5590849d98497f721d9dd3a07f8054b11"`
Dec 15 08:53:29.904 INFO [stdout] d9cd53865a507f77f924569157362dc5590849d98497f721d9dd3a07f8054b11