[INFO] updating cached repository raphlinus/ghilbert
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/raphlinus/ghilbert
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/raphlinus/ghilbert" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/raphlinus/ghilbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/raphlinus/ghilbert'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/raphlinus/ghilbert" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 52428c6e7797c288407a36238c822bf7f56639f3
[INFO] sha for GitHub repo raphlinus/ghilbert: 52428c6e7797c288407a36238c822bf7f56639f3
[INFO] validating manifest of raphlinus/ghilbert on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of raphlinus/ghilbert on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing raphlinus/ghilbert
[INFO] finished frobbing raphlinus/ghilbert
[INFO] frobbed toml for raphlinus/ghilbert written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/raphlinus/ghilbert/Cargo.toml
[INFO] started frobbing raphlinus/ghilbert
[INFO] finished frobbing raphlinus/ghilbert
[INFO] frobbed toml for raphlinus/ghilbert written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert/Cargo.toml
[INFO] crate raphlinus/ghilbert has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing raphlinus/ghilbert against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] 8ba46fadc56ec60aaed598b0e6897563020acfcdc9fcffc2b3d0e1ab93c2c54c
[INFO] running `"docker" "start" "-a" "8ba46fadc56ec60aaed598b0e6897563020acfcdc9fcffc2b3d0e1ab93c2c54c"`
[INFO] [stderr]    Compiling union-find v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.2
[INFO] [stderr]    Compiling ghilbert v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: doc comment not used by rustdoc
[INFO] [stderr]    --> src/unify.rs:471:9
[INFO] [stderr]     |
[INFO] [stderr] 471 |         /// Maps node of bound var to set of term var nodes it can appear free in.
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]    --> src/htmlout.rs:128:39
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn write<W: Write>(&mut self, writer: &mut W, parser: &Parser) -> io::Result<()> {
[INFO] [stderr]     |                                       ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/htmlout.rs:371:30
[INFO] [stderr]     |
[INFO] [stderr] 371 |     fn start_line(&mut self, line: &ParseNode) {
[INFO] [stderr]     |                              ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lexer.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let mut node = self.root.traverse(s.chars());
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cur_info`
[INFO] [stderr]    --> src/htmlout.rs:307:5
[INFO] [stderr]     |
[INFO] [stderr] 307 |     fn cur_info(&self) -> &ThmInfo {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_end`
[INFO] [stderr]   --> src/parser.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn get_end(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `session`
[INFO] [stderr]    --> src/session.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 |     session: &'b Session<'a>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.43s
[INFO] running `"docker" "inspect" "8ba46fadc56ec60aaed598b0e6897563020acfcdc9fcffc2b3d0e1ab93c2c54c"`
[INFO] running `"docker" "rm" "-f" "8ba46fadc56ec60aaed598b0e6897563020acfcdc9fcffc2b3d0e1ab93c2c54c"`
[INFO] [stdout] 8ba46fadc56ec60aaed598b0e6897563020acfcdc9fcffc2b3d0e1ab93c2c54c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 77abf2bf48e36ab900ff1ebdedf44fbe3ab2c761d5c2fab924446e0fc25d6356
[INFO] running `"docker" "start" "-a" "77abf2bf48e36ab900ff1ebdedf44fbe3ab2c761d5c2fab924446e0fc25d6356"`
[INFO] [stderr]    Compiling ghilbert v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: doc comment not used by rustdoc
[INFO] [stderr]    --> src/unify.rs:471:9
[INFO] [stderr]     |
[INFO] [stderr] 471 |         /// Maps node of bound var to set of term var nodes it can appear free in.
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]    --> src/htmlout.rs:128:39
[INFO] [stderr]     |
[INFO] [stderr] 128 |     pub fn write<W: Write>(&mut self, writer: &mut W, parser: &Parser) -> io::Result<()> {
[INFO] [stderr]     |                                       ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/htmlout.rs:371:30
[INFO] [stderr]     |
[INFO] [stderr] 371 |     fn start_line(&mut self, line: &ParseNode) {
[INFO] [stderr]     |                              ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lexer.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let mut node = self.root.traverse(s.chars());
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cur_info`
[INFO] [stderr]    --> src/htmlout.rs:307:5
[INFO] [stderr]     |
[INFO] [stderr] 307 |     fn cur_info(&self) -> &ThmInfo {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_end`
[INFO] [stderr]   --> src/parser.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn get_end(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `session`
[INFO] [stderr]    --> src/session.rs:566:5
[INFO] [stderr]     |
[INFO] [stderr] 566 |     session: &'b Session<'a>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `"docker" "inspect" "77abf2bf48e36ab900ff1ebdedf44fbe3ab2c761d5c2fab924446e0fc25d6356"`
[INFO] running `"docker" "rm" "-f" "77abf2bf48e36ab900ff1ebdedf44fbe3ab2c761d5c2fab924446e0fc25d6356"`
[INFO] [stdout] 77abf2bf48e36ab900ff1ebdedf44fbe3ab2c761d5c2fab924446e0fc25d6356
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/raphlinus/ghilbert:/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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] bc2db333fe6eb831d0765aed0a2994cb2cc3f1962f29e9c7a661173fe0c703e5
[INFO] running `"docker" "start" "-a" "bc2db333fe6eb831d0765aed0a2994cb2cc3f1962f29e9c7a661173fe0c703e5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ghilbert-f1b2856d08c47b1a
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "bc2db333fe6eb831d0765aed0a2994cb2cc3f1962f29e9c7a661173fe0c703e5"`
[INFO] running `"docker" "rm" "-f" "bc2db333fe6eb831d0765aed0a2994cb2cc3f1962f29e9c7a661173fe0c703e5"`
[INFO] [stdout] bc2db333fe6eb831d0765aed0a2994cb2cc3f1962f29e9c7a661173fe0c703e5