[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-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/sinesc/itsy"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/sinesc/itsy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sinesc/itsy" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/sinesc/itsy"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sinesc/itsy on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-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-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/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-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sinesc/itsy against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-0/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8aeb3e0f7d5c31b49e794bda5a01a60e6ea92d4a230b1032a6d26424a630ce68
[INFO] running `"docker" "start" "-a" "8aeb3e0f7d5c31b49e794bda5a01a60e6ea92d4a230b1032a6d26424a630ce68"`
[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]    |
[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: 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] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/frontend/resolver.rs:362:13
[INFO] [stderr]     |
[INFO] [stderr] 361 |             let function_type = self.scopes.function_type(function_id);
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 362 |             self.resolve_block(&mut item.block, function_type.ret_type);
[INFO] [stderr]     |             ^^^^ mutable borrow occurs here     ---------------------- immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/frontend/resolver.rs:362:13
[INFO] [stderr]     |
[INFO] [stderr] 361 |             let function_type = self.scopes.function_type(function_id);
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 362 |             self.resolve_block(&mut item.block, function_type.ret_type);
[INFO] [stderr]     |             ^^^^ mutable borrow occurs here     ---------------------- immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[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 6.88s
[INFO] running `"docker" "inspect" "8aeb3e0f7d5c31b49e794bda5a01a60e6ea92d4a230b1032a6d26424a630ce68"`
[INFO] running `"docker" "rm" "-f" "8aeb3e0f7d5c31b49e794bda5a01a60e6ea92d4a230b1032a6d26424a630ce68"`
[INFO] [stdout] 8aeb3e0f7d5c31b49e794bda5a01a60e6ea92d4a230b1032a6d26424a630ce68