[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-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/raphlinus/ghilbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/raphlinus/ghilbert'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/raphlinus/ghilbert" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/raphlinus/ghilbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of raphlinus/ghilbert on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-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-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/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-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/raphlinus/ghilbert/Cargo.toml
[INFO] crate raphlinus/ghilbert already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking raphlinus/ghilbert against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6d6bbaf06d2bb9e8e0cd6391a2356b146c9fc016c68ce8d23002d8c2f49c5971
[INFO] running `"docker" "start" "-a" "6d6bbaf06d2bb9e8e0cd6391a2356b146c9fc016c68ce8d23002d8c2f49c5971"`
[INFO] [stderr]     Checking union-find v0.3.1
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking ghilbert v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[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] 472 |         let mut free_set = BTreeMap::new();
[INFO] [stderr]     |         ----------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[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] 472 |         let mut free_set = BTreeMap::new();
[INFO] [stderr]     |         ----------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/htmlout.rs:342:45
[INFO] [stderr]     |
[INFO] [stderr] 342 |     fn end_proof(&mut self, inspector: &mut Inspector, parser: &Parser) {
[INFO] [stderr]     |                                             ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prooflistener.rs:30:45
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn end_proof(&mut self, inspector: &mut Inspector, parser: &Parser);
[INFO] [stderr]    |                                             ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prooflistener.rs:61:46
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn end_proof(&mut self, _inspector: &mut Inspector, _parser: &Parser) {
[INFO] [stderr]    |                                              ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/htmlout.rs:342:45
[INFO] [stderr]     |
[INFO] [stderr] 342 |     fn end_proof(&mut self, inspector: &mut Inspector, parser: &Parser) {
[INFO] [stderr]     |                                             ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prooflistener.rs:30:45
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn end_proof(&mut self, inspector: &mut Inspector, parser: &Parser);
[INFO] [stderr]    |                                             ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prooflistener.rs:61:46
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn end_proof(&mut self, _inspector: &mut Inspector, _parser: &Parser) {
[INFO] [stderr]    |                                              ^^^^^^^^^ help: use `dyn`: `dyn Inspector`
[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: 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: 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] 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 4.85s
[INFO] running `"docker" "inspect" "6d6bbaf06d2bb9e8e0cd6391a2356b146c9fc016c68ce8d23002d8c2f49c5971"`
[INFO] running `"docker" "rm" "-f" "6d6bbaf06d2bb9e8e0cd6391a2356b146c9fc016c68ce8d23002d8c2f49c5971"`
[INFO] [stdout] 6d6bbaf06d2bb9e8e0cd6391a2356b146c9fc016c68ce8d23002d8c2f49c5971