[INFO] crate hindley-milner 0.1.0 is already in cache
[INFO] extracting crate hindley-milner 0.1.0 into work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/hindley-milner/0.1.0
[INFO] extracting crate hindley-milner 0.1.0 into work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/hindley-milner/0.1.0
[INFO] validating manifest of hindley-milner-0.1.0 on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hindley-milner-0.1.0 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hindley-milner-0.1.0
[INFO] finished frobbing hindley-milner-0.1.0
[INFO] frobbed toml for hindley-milner-0.1.0 written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/hindley-milner/0.1.0/Cargo.toml
[INFO] started frobbing hindley-milner-0.1.0
[INFO] finished frobbing hindley-milner-0.1.0
[INFO] frobbed toml for hindley-milner-0.1.0 written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/hindley-milner/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking hindley-milner-0.1.0 against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-2/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/hindley-milner/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 596b1a3baae73f4b87d32d69339c482c6d3885f3040a46a6f567fafe8aa680c3
[INFO] running `"docker" "start" "-a" "596b1a3baae73f4b87d32d69339c482c6d3885f3040a46a6f567fafe8aa680c3"`
[INFO] [stderr]     Checking hindley-milner v0.1.0 (/opt/crater/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: 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 0.57s
[INFO] running `"docker" "inspect" "596b1a3baae73f4b87d32d69339c482c6d3885f3040a46a6f567fafe8aa680c3"`
[INFO] running `"docker" "rm" "-f" "596b1a3baae73f4b87d32d69339c482c6d3885f3040a46a6f567fafe8aa680c3"`
[INFO] [stdout] 596b1a3baae73f4b87d32d69339c482c6d3885f3040a46a6f567fafe8aa680c3