[INFO] updating cached repository https://github.com/m-bra/swirl
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/m-bra/swirl
[INFO] [stderr]    00ace87..2b7459a  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2b7459ae84cc4acb4585c33ff4a2bb080fd80a03
[INFO] checking m-bra/swirl against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-bra%2Fswirl" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/m-bra/swirl on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/m-bra/swirl
[INFO] finished tweaking git repo https://github.com/m-bra/swirl
[INFO] tweaked toml for git repo https://github.com/m-bra/swirl written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 897abe3702bf4003ca82e681b01ad5b9ce838f6fdcd88f2575deb4108af1fa5f
[INFO] running `"docker" "start" "-a" "897abe3702bf4003ca82e681b01ad5b9ce838f6fdcd88f2575deb4108af1fa5f"`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]     Checking finally-block v0.2.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr]     Checking swirl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/mmatch/match_rule_variant.rs:156:58
[INFO] [stderr]     |
[INFO] [stderr] 151 | /                         unimplemented!("
[INFO] [stderr] 152 | |                             this program crashed because the coder was too lazy to implement a specific case. sorry.
[INFO] [stderr] 153 | |                             okay but alright to be fair, recursive rules are unefficient when they have bodies.
[INFO] [stderr] 154 | |                         "); 
[INFO] [stderr]     | |___________________________- any code following this expression is unreachable
[INFO] [stderr] 155 |                           // the following code needs to be fixed by ...
[INFO] [stderr] 156 |                           for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `level` is never read
[INFO] [stderr]    --> src/mmatch/match_invocation_string.rs:229:13
[INFO] [stderr]     |
[INFO] [stderr] 229 |             level -= 1;
[INFO] [stderr]     |             ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `frame_result` is never read
[INFO] [stderr]    --> src/mmatch/match_rule_variant.rs:115:29
[INFO] [stderr]     |
[INFO] [stderr] 115 |                     let mut frame_result = Ok(("", InvocStrResult::empty())); // result of current frame
[INFO] [stderr]     |                             ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `body`
[INFO] [stderr]    --> src/mmatch/match_rule_variant.rs:150:33
[INFO] [stderr]     |
[INFO] [stderr] 150 |                     if let Some(body) = &self.body {
[INFO] [stderr]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/mmatch/match_rule_variant.rs:168:33
[INFO] [stderr]     |
[INFO] [stderr] 168 |                         for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[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: static variable `first` should have an upper case name
[INFO] [stderr]  --> src/mmatch/match_rule_variant.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | static mut first: bool = true;
[INFO] [stderr]   |            ^^^^^ help: convert the identifier to upper case: `FIRST`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `parse_header` in this scope
[INFO] [stderr]   --> src/mmatch/match_rule.rs:79:17
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 parse_header("::digit").unwrap(), None
[INFO] [stderr]    |                 ^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `parse_header` in this scope
[INFO] [stderr]   --> src/mmatch/match_rule.rs:82:17
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 parse_header(":d:digit::digits").unwrap(),
[INFO] [stderr]    |                 ^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `parse_body` in this scope
[INFO] [stderr]   --> src/mmatch/match_rule.rs:83:22
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 Some(parse_body("Two .times: :d:d").unwrap()),
[INFO] [stderr]    |                      ^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/mmatch/match_rule_variant.rs:156:58
[INFO] [stderr]     |
[INFO] [stderr] 151 | /                         unimplemented!("
[INFO] [stderr] 152 | |                             this program crashed because the coder was too lazy to implement a specific case. sorry.
[INFO] [stderr] 153 | |                             okay but alright to be fair, recursive rules are unefficient when they have bodies.
[INFO] [stderr] 154 | |                         "); 
[INFO] [stderr]     | |___________________________- any code following this expression is unreachable
[INFO] [stderr] 155 |                           // the following code needs to be fixed by ...
[INFO] [stderr] 156 |                           for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/types/invocation_string.rs:142:82
[INFO] [stderr]     |
[INFO] [stderr] 142 |     let header = match_invocation_string_def("{::expr {' or '} ::or}", '{', '}', WhiteSpaceHandling::Remove)  .unwrap().1.unwrap();
[INFO] [stderr]     |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                                                                                  |
[INFO] [stderr]     |                                                                                  expected `&mmatch::match_invocation_string::WhiteSpaceHandling`, found enum `mmatch::match_invocation_string::WhiteSpaceHandling`
[INFO] [stderr]     |                                                                                  help: consider borrowing here: `&WhiteSpaceHandling::Remove`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0425.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `swirl`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "897abe3702bf4003ca82e681b01ad5b9ce838f6fdcd88f2575deb4108af1fa5f"`
[INFO] running `"docker" "rm" "-f" "897abe3702bf4003ca82e681b01ad5b9ce838f6fdcd88f2575deb4108af1fa5f"`
[INFO] [stdout] 897abe3702bf4003ca82e681b01ad5b9ce838f6fdcd88f2575deb4108af1fa5f
