Dec 11 11:19:28.488 INFO checking raphlinus/ghilbert against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 11:19:28.488 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 11:19:29.050 INFO [stdout] 6b864b8b9b14d7d693c80c11e4b553273366111a9aed4e04b3c493168b9856d4
Dec 11 11:19:29.054 INFO running `"docker" "start" "-a" "6b864b8b9b14d7d693c80c11e4b553273366111a9aed4e04b3c493168b9856d4"`
Dec 11 11:19:31.151 INFO [stderr] usermod: no changes
Dec 11 11:19:31.280 INFO [stderr]     Checking itoa v0.3.3
Dec 11 11:19:31.280 INFO [stderr]     Checking union-find v0.3.1
Dec 11 11:19:31.873 INFO [stderr]     Checking serde_json v1.0.2
Dec 11 11:19:34.032 INFO [stderr]     Checking ghilbert v0.1.0 (/source)
Dec 11 11:19:34.394 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 11:19:34.394 INFO [stderr]    --> src/unify.rs:471:9
Dec 11 11:19:34.394 INFO [stderr]     |
Dec 11 11:19:34.394 INFO [stderr] 471 |         /// Maps node of bound var to set of term var nodes it can appear free in.
Dec 11 11:19:34.394 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:34.394 INFO [stderr]     |
Dec 11 11:19:34.394 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 11 11:19:34.394 INFO [stderr] 
Dec 11 11:19:34.468 INFO [stderr] warning: doc comment not used by rustdoc
Dec 11 11:19:34.468 INFO [stderr]    --> src/unify.rs:471:9
Dec 11 11:19:34.468 INFO [stderr]     |
Dec 11 11:19:34.468 INFO [stderr] 471 |         /// Maps node of bound var to set of term var nodes it can appear free in.
Dec 11 11:19:34.468 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:34.468 INFO [stderr]     |
Dec 11 11:19:34.468 INFO [stderr]     = note: #[warn(unused_doc_comments)] on by default
Dec 11 11:19:34.468 INFO [stderr] 
Dec 11 11:19:34.960 INFO [stderr] warning: unused variable: `writer`
Dec 11 11:19:34.960 INFO [stderr]    --> src/htmlout.rs:128:39
Dec 11 11:19:34.960 INFO [stderr]     |
Dec 11 11:19:34.960 INFO [stderr] 128 |     pub fn write<W: Write>(&mut self, writer: &mut W, parser: &Parser) -> io::Result<()> {
Dec 11 11:19:34.960 INFO [stderr]     |                                       ^^^^^^ help: consider using `_writer` instead
Dec 11 11:19:34.960 INFO [stderr]     |
Dec 11 11:19:34.960 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 11:19:34.960 INFO [stderr] 
Dec 11 11:19:34.960 INFO [stderr] warning: unused variable: `line`
Dec 11 11:19:34.960 INFO [stderr]    --> src/htmlout.rs:371:30
Dec 11 11:19:34.960 INFO [stderr]     |
Dec 11 11:19:34.960 INFO [stderr] 371 |     fn start_line(&mut self, line: &ParseNode) {
Dec 11 11:19:34.960 INFO [stderr]     |                              ^^^^ help: consider using `_line` instead
Dec 11 11:19:34.960 INFO [stderr] 
Dec 11 11:19:35.068 INFO [stderr] warning: variable does not need to be mutable
Dec 11 11:19:35.068 INFO [stderr]    --> src/lexer.rs:132:13
Dec 11 11:19:35.068 INFO [stderr]     |
Dec 11 11:19:35.068 INFO [stderr] 132 |         let mut node = self.root.traverse(s.chars());
Dec 11 11:19:35.068 INFO [stderr]     |             ----^^^^
Dec 11 11:19:35.068 INFO [stderr]     |             |
Dec 11 11:19:35.068 INFO [stderr]     |             help: remove this `mut`
Dec 11 11:19:35.068 INFO [stderr]     |
Dec 11 11:19:35.068 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 11:19:35.068 INFO [stderr] 
Dec 11 11:19:35.108 INFO [stderr] warning: unused variable: `writer`
Dec 11 11:19:35.108 INFO [stderr]    --> src/htmlout.rs:128:39
Dec 11 11:19:35.108 INFO [stderr]     |
Dec 11 11:19:35.108 INFO [stderr] 128 |     pub fn write<W: Write>(&mut self, writer: &mut W, parser: &Parser) -> io::Result<()> {
Dec 11 11:19:35.108 INFO [stderr]     |                                       ^^^^^^ help: consider using `_writer` instead
Dec 11 11:19:35.108 INFO [stderr]     |
Dec 11 11:19:35.108 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 11:19:35.108 INFO [stderr] 
Dec 11 11:19:35.108 INFO [stderr] warning: unused variable: `line`
Dec 11 11:19:35.108 INFO [stderr]    --> src/htmlout.rs:371:30
Dec 11 11:19:35.108 INFO [stderr]     |
Dec 11 11:19:35.108 INFO [stderr] 371 |     fn start_line(&mut self, line: &ParseNode) {
Dec 11 11:19:35.108 INFO [stderr]     |                              ^^^^ help: consider using `_line` instead
Dec 11 11:19:35.108 INFO [stderr] 
Dec 11 11:19:35.184 INFO [stderr] warning: variable does not need to be mutable
Dec 11 11:19:35.184 INFO [stderr]    --> src/lexer.rs:132:13
Dec 11 11:19:35.184 INFO [stderr]     |
Dec 11 11:19:35.184 INFO [stderr] 132 |         let mut node = self.root.traverse(s.chars());
Dec 11 11:19:35.184 INFO [stderr]     |             ----^^^^
Dec 11 11:19:35.184 INFO [stderr]     |             |
Dec 11 11:19:35.184 INFO [stderr]     |             help: remove this `mut`
Dec 11 11:19:35.184 INFO [stderr]     |
Dec 11 11:19:35.184 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 11:19:35.184 INFO [stderr] 
Dec 11 11:19:35.238 INFO [stderr] warning: method is never used: `cur_info`
Dec 11 11:19:35.238 INFO [stderr]    --> src/htmlout.rs:307:5
Dec 11 11:19:35.238 INFO [stderr]     |
Dec 11 11:19:35.238 INFO [stderr] 307 |     fn cur_info(&self) -> &ThmInfo {
Dec 11 11:19:35.238 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.238 INFO [stderr]     |
Dec 11 11:19:35.238 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 11:19:35.238 INFO [stderr] 
Dec 11 11:19:35.238 INFO [stderr] warning: method is never used: `get_end`
Dec 11 11:19:35.238 INFO [stderr]   --> src/parser.rs:44:5
Dec 11 11:19:35.238 INFO [stderr]    |
Dec 11 11:19:35.238 INFO [stderr] 44 |     pub fn get_end(&self) -> usize {
Dec 11 11:19:35.238 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.238 INFO [stderr] 
Dec 11 11:19:35.239 INFO [stderr] warning: field is never used: `session`
Dec 11 11:19:35.239 INFO [stderr]    --> src/session.rs:566:5
Dec 11 11:19:35.239 INFO [stderr]     |
Dec 11 11:19:35.239 INFO [stderr] 566 |     session: &'b Session<'a>,
Dec 11 11:19:35.239 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.239 INFO [stderr] 
Dec 11 11:19:35.421 INFO [stderr] warning: method is never used: `cur_info`
Dec 11 11:19:35.421 INFO [stderr]    --> src/htmlout.rs:307:5
Dec 11 11:19:35.421 INFO [stderr]     |
Dec 11 11:19:35.421 INFO [stderr] 307 |     fn cur_info(&self) -> &ThmInfo {
Dec 11 11:19:35.421 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.421 INFO [stderr]     |
Dec 11 11:19:35.421 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 11:19:35.421 INFO [stderr] 
Dec 11 11:19:35.421 INFO [stderr] warning: method is never used: `get_end`
Dec 11 11:19:35.421 INFO [stderr]   --> src/parser.rs:44:5
Dec 11 11:19:35.421 INFO [stderr]    |
Dec 11 11:19:35.421 INFO [stderr] 44 |     pub fn get_end(&self) -> usize {
Dec 11 11:19:35.421 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.421 INFO [stderr] 
Dec 11 11:19:35.421 INFO [stderr] warning: field is never used: `session`
Dec 11 11:19:35.421 INFO [stderr]    --> src/session.rs:566:5
Dec 11 11:19:35.421 INFO [stderr]     |
Dec 11 11:19:35.421 INFO [stderr] 566 |     session: &'b Session<'a>,
Dec 11 11:19:35.421 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 11:19:35.421 INFO [stderr] 
Dec 11 11:19:35.480 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.29s
Dec 11 11:19:35.480 INFO [stderr] su: No module specific data is present
Dec 11 11:19:36.116 INFO running `"docker" "inspect" "6b864b8b9b14d7d693c80c11e4b553273366111a9aed4e04b3c493168b9856d4"`
Dec 11 11:19:36.326 INFO running `"docker" "rm" "-f" "6b864b8b9b14d7d693c80c11e4b553273366111a9aed4e04b3c493168b9856d4"`
Dec 11 11:19:36.536 INFO [stdout] 6b864b8b9b14d7d693c80c11e4b553273366111a9aed4e04b3c493168b9856d4