[INFO] crate hindley-milner 0.1.0 is already in cache
[INFO] testing hindley-milner-0.1.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate hindley-milner 0.1.0 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate hindley-milner 0.1.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate hindley-milner 0.1.0
[INFO] finished tweaking crates.io crate hindley-milner 0.1.0
[INFO] tweaked toml for crates.io crate hindley-milner 0.1.0 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 97a88f2c1cc00e0d022219dd3e5a1c360d2866135079a6e7c0d98f80bb1d7a4a
[INFO] running `"docker" "start" "-a" "97a88f2c1cc00e0d022219dd3e5a1c360d2866135079a6e7c0d98f80bb1d7a4a"`
[INFO] [stderr]    Compiling maplit v0.1.6
[INFO] [stderr]    Compiling hindley-milner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:206:1
[INFO] [stderr]     |
[INFO] [stderr] 206 | / lazy_static! {
[INFO] [stderr] 207 | |     // Basic integer
[INFO] [stderr] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stderr] 209 | |     // Basic bool
[INFO] [stderr] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stderr] 211 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:206:1
[INFO] [stderr]     |
[INFO] [stderr] 206 | / lazy_static! {
[INFO] [stderr] 207 | |     // Basic integer
[INFO] [stderr] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stderr] 209 | |     // Basic bool
[INFO] [stderr] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stderr] 211 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Namer`
[INFO] [stderr]   --> src/lib.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | struct Namer {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]   --> src/lib.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn next(&mut self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `name`
[INFO] [stderr]   --> src/lib.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn name(&mut self, t: ArenaType) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `id`
[INFO] [stderr]    --> src/lib.rs:124:5
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn id(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `as_string`
[INFO] [stderr]    --> src/lib.rs:146:5
[INFO] [stderr]     |
[INFO] [stderr] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_env`
[INFO] [stderr]    --> src/lib.rs:537:1
[INFO] [stderr]     |
[INFO] [stderr] 537 | fn test_env() -> (Vec<Type>, Env) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "97a88f2c1cc00e0d022219dd3e5a1c360d2866135079a6e7c0d98f80bb1d7a4a"`
[INFO] running `"docker" "rm" "-f" "97a88f2c1cc00e0d022219dd3e5a1c360d2866135079a6e7c0d98f80bb1d7a4a"`
[INFO] [stdout] 97a88f2c1cc00e0d022219dd3e5a1c360d2866135079a6e7c0d98f80bb1d7a4a
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] c3e491fc2b63ddbe7e5b2950e7d846b09b9c4bd48e606103583f48921bcb15d4
[INFO] running `"docker" "start" "-a" "c3e491fc2b63ddbe7e5b2950e7d846b09b9c4bd48e606103583f48921bcb15d4"`
[INFO] [stderr]    Compiling hindley-milner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:206:1
[INFO] [stderr]     |
[INFO] [stderr] 206 | / lazy_static! {
[INFO] [stderr] 207 | |     // Basic integer
[INFO] [stderr] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stderr] 209 | |     // Basic bool
[INFO] [stderr] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stderr] 211 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:206:1
[INFO] [stderr]     |
[INFO] [stderr] 206 | / lazy_static! {
[INFO] [stderr] 207 | |     // Basic integer
[INFO] [stderr] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stderr] 209 | |     // Basic bool
[INFO] [stderr] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stderr] 211 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "c3e491fc2b63ddbe7e5b2950e7d846b09b9c4bd48e606103583f48921bcb15d4"`
[INFO] running `"docker" "rm" "-f" "c3e491fc2b63ddbe7e5b2950e7d846b09b9c4bd48e606103583f48921bcb15d4"`
[INFO] [stdout] c3e491fc2b63ddbe7e5b2950e7d846b09b9c4bd48e606103583f48921bcb15d4
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] e725a9ab693482f505f3a7203f7df2e5c0c66d0d7bbbe1532fc43fc530a8886a
[INFO] running `"docker" "start" "-a" "e725a9ab693482f505f3a7203f7df2e5c0c66d0d7bbbe1532fc43fc530a8886a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hindley_milner-29451db8d5a21746
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test test_composition ... ok
[INFO] [stdout] test test_fun ... ok
[INFO] [stdout] test test_int ... ok
[INFO] [stdout] test test_factorial ... ok
[INFO] [stdout] test test_generic_nongeneric ... ok
[INFO] [stdout] test test_mul ... ok
[INFO] [stdout] test test_pair ... ok
[INFO] [stdout] test test_recursive ... ok
[INFO] [stdout] test test_mismatch ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e725a9ab693482f505f3a7203f7df2e5c0c66d0d7bbbe1532fc43fc530a8886a"`
[INFO] running `"docker" "rm" "-f" "e725a9ab693482f505f3a7203f7df2e5c0c66d0d7bbbe1532fc43fc530a8886a"`
[INFO] [stdout] e725a9ab693482f505f3a7203f7df2e5c0c66d0d7bbbe1532fc43fc530a8886a