[INFO] fetching crate hindley-milner 0.1.0...
[INFO] testing hindley-milner-0.1.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate hindley-milner 0.1.0 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate hindley-milner 0.1.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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 /workspace/builds/worker-22/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d390d3a94600c070c78edc446ec500e887e2aec23585db1192a28a6dc28c9e3c
[INFO] running `Command { std: "docker" "start" "-a" "d390d3a94600c070c78edc446ec500e887e2aec23585db1192a28a6dc28c9e3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d390d3a94600c070c78edc446ec500e887e2aec23585db1192a28a6dc28c9e3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d390d3a94600c070c78edc446ec500e887e2aec23585db1192a28a6dc28c9e3c", kill_on_drop: false }`
[INFO] [stdout] d390d3a94600c070c78edc446ec500e887e2aec23585db1192a28a6dc28c9e3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b94a678454ab8e9697c577de009caae75f4d39745604041e998b88d6c9eca175
[INFO] running `Command { std: "docker" "start" "-a" "b94a678454ab8e9697c577de009caae75f4d39745604041e998b88d6c9eca175", kill_on_drop: false }`
[INFO] [stderr]    Compiling maplit v0.1.6
[INFO] [stderr]    Compiling hindley-milner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:206:1
[INFO] [stdout]     |
[INFO] [stdout] 206 | / lazy_static! {
[INFO] [stdout] 207 | |     // Basic integer
[INFO] [stdout] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stdout] 209 | |     // Basic bool
[INFO] [stdout] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stdout] 211 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:206:1
[INFO] [stdout]     |
[INFO] [stdout] 206 | / lazy_static! {
[INFO] [stdout] 207 | |     // Basic integer
[INFO] [stdout] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stdout] 209 | |     // Basic bool
[INFO] [stdout] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stdout] 211 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Namer`
[INFO] [stdout]   --> src/lib.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Namer {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/lib.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn next(&mut self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `name`
[INFO] [stdout]   --> src/lib.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn name(&mut self, t: ArenaType) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `id`
[INFO] [stdout]    --> src/lib.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn id(&self) -> usize {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_string`
[INFO] [stdout]    --> src/lib.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn as_string(&self, a: &Vec<Type>, namer: &mut Namer) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_env`
[INFO] [stdout]    --> src/lib.rs:537:4
[INFO] [stdout]     |
[INFO] [stdout] 537 | fn test_env() -> (Vec<Type>, Env) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "b94a678454ab8e9697c577de009caae75f4d39745604041e998b88d6c9eca175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b94a678454ab8e9697c577de009caae75f4d39745604041e998b88d6c9eca175", kill_on_drop: false }`
[INFO] [stdout] b94a678454ab8e9697c577de009caae75f4d39745604041e998b88d6c9eca175
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f825a7e6f37bea8a45a8a7c54bc8c1fe29e4154f235a2ee112d36f4850528af1
[INFO] running `Command { std: "docker" "start" "-a" "f825a7e6f37bea8a45a8a7c54bc8c1fe29e4154f235a2ee112d36f4850528af1", kill_on_drop: false }`
[INFO] [stderr]    Compiling hindley-milner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:206:1
[INFO] [stdout]     |
[INFO] [stdout] 206 | / lazy_static! {
[INFO] [stdout] 207 | |     // Basic integer
[INFO] [stdout] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stdout] 209 | |     // Basic bool
[INFO] [stdout] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stdout] 211 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:206:1
[INFO] [stdout]     |
[INFO] [stdout] 206 | / lazy_static! {
[INFO] [stdout] 207 | |     // Basic integer
[INFO] [stdout] 208 | |     static ref INTEGER: Type = Type::new_operator(0, "int", &[]);
[INFO] [stdout] 209 | |     // Basic bool
[INFO] [stdout] 210 | |     static ref BOOL: Type = Type::new_operator(1, "bool", &[]);
[INFO] [stdout] 211 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/hindley_milner-5488de3550573477)
[INFO] running `Command { std: "docker" "inspect" "f825a7e6f37bea8a45a8a7c54bc8c1fe29e4154f235a2ee112d36f4850528af1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f825a7e6f37bea8a45a8a7c54bc8c1fe29e4154f235a2ee112d36f4850528af1", kill_on_drop: false }`
[INFO] [stdout] f825a7e6f37bea8a45a8a7c54bc8c1fe29e4154f235a2ee112d36f4850528af1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 759d8e18eba61d5beb25d6f3550a4a8001720132365e6695ba165aac3d50567a
[INFO] running `Command { std: "docker" "start" "-a" "759d8e18eba61d5beb25d6f3550a4a8001720132365e6695ba165aac3d50567a", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated constant `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 the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `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 the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `hindley-milner` (lib test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/hindley_milner-5488de3550573477)
[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_mismatch - should panic ... ok
[INFO] [stdout] test test_pair - should panic ... ok
[INFO] [stdout] test test_recursive - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "759d8e18eba61d5beb25d6f3550a4a8001720132365e6695ba165aac3d50567a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "759d8e18eba61d5beb25d6f3550a4a8001720132365e6695ba165aac3d50567a", kill_on_drop: false }`
[INFO] [stdout] 759d8e18eba61d5beb25d6f3550a4a8001720132365e6695ba165aac3d50567a