[INFO] updating cached repository sinesc/itsy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sinesc/itsy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sinesc/itsy" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sinesc/itsy"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sinesc/itsy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sinesc/itsy" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sinesc/itsy"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sinesc/itsy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ef29a4466528a88c86a08961edb77a198fb05fee
[INFO] sha for GitHub repo sinesc/itsy: ef29a4466528a88c86a08961edb77a198fb05fee
[INFO] validating manifest of sinesc/itsy on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sinesc/itsy on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sinesc/itsy
[INFO] finished frobbing sinesc/itsy
[INFO] frobbed toml for sinesc/itsy written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sinesc/itsy/Cargo.toml
[INFO] started frobbing sinesc/itsy
[INFO] finished frobbing sinesc/itsy
[INFO] frobbed toml for sinesc/itsy written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sinesc/itsy/Cargo.toml
[INFO] crate sinesc/itsy already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sinesc/itsy against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sinesc/itsy:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 77ec360fc15c5bcf4e1beb0adfa91fdc85f341fc5a1825d6acbf166e9bf46387
[INFO] running `"docker" "start" "-a" "77ec360fc15c5bcf4e1beb0adfa91fdc85f341fc5a1825d6acbf166e9bf46387"`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking nom v4.1.1
[INFO] [stderr]     Checking itsy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | /// Unique numeric id of a type.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 33 | impl_typed_id!(TypeId);
[INFO] [stderr]    | ----------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | /// Unique numeric id of a type.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 33 | impl_typed_id!(TypeId);
[INFO] [stderr]    | ----------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// Unique numeric id of a scope.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 42 | impl_typed_id!(ScopeId);
[INFO] [stderr]    | ------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | /// Unique numeric id of a variable binding.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 45 | impl_typed_id!(BindingId);
[INFO] [stderr]    | -------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | /// Unique numeric id of a function.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 48 | impl_typed_id!(FunctionId);
[INFO] [stderr]    | --------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// Unique numeric id of a scope.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 42 | impl_typed_id!(ScopeId);
[INFO] [stderr]    | ------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | /// Unique numeric id of a variable binding.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 45 | impl_typed_id!(BindingId);
[INFO] [stderr]    | -------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/util/typed_ids.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | /// Unique numeric id of a function.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 48 | impl_typed_id!(FunctionId);
[INFO] [stderr]    | --------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `function_id`
[INFO] [stderr]    --> src/frontend/resolver/scopes.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn function_id(self: &Self, scope_id: ScopeId, name: &str) -> Option<FunctionId> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_type`
[INFO] [stderr]    --> src/frontend/resolver.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     fn format_type(self: &Self, type_id: Option<TypeId>) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `function_id`
[INFO] [stderr]    --> src/frontend/resolver/scopes.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     pub fn function_id(self: &Self, scope_id: ScopeId, name: &str) -> Option<FunctionId> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_type`
[INFO] [stderr]    --> src/frontend/resolver.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     fn format_type(self: &Self, type_id: Option<TypeId>) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/playground.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let source = "
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/playground.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let source = "
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/playground.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let source = "
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/playground.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let source = "
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.98s
[INFO] running `"docker" "inspect" "77ec360fc15c5bcf4e1beb0adfa91fdc85f341fc5a1825d6acbf166e9bf46387"`
[INFO] running `"docker" "rm" "-f" "77ec360fc15c5bcf4e1beb0adfa91fdc85f341fc5a1825d6acbf166e9bf46387"`
[INFO] [stdout] 77ec360fc15c5bcf4e1beb0adfa91fdc85f341fc5a1825d6acbf166e9bf46387