[INFO] cloning repository https://github.com/m-bra/swirl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m-bra/swirl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-bra%2Fswirl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-bra%2Fswirl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb6a77d31a8fdc72b6cba25f17234842b987ad9c
[INFO] checking m-bra/swirl against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-bra%2Fswirl" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[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 af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51474f09ad1db6c0f4449b4d97f61451994ccd0aed91421d7297badf9df6c500
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "51474f09ad1db6c0f4449b4d97f61451994ccd0aed91421d7297badf9df6c500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51474f09ad1db6c0f4449b4d97f61451994ccd0aed91421d7297badf9df6c500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51474f09ad1db6c0f4449b4d97f61451994ccd0aed91421d7297badf9df6c500", kill_on_drop: false }`
[INFO] [stdout] 51474f09ad1db6c0f4449b4d97f61451994ccd0aed91421d7297badf9df6c500
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1602c172ad8694754f792fafd1b1801e6cfed617796186c3ba7ed6c0f15e8c80
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1602c172ad8694754f792fafd1b1801e6cfed617796186c3ba7ed6c0f15e8c80", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking finally-block v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]     Checking memchr v2.3.3
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking swirl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/mmatch/match_rule_variant.rs:156:58
[INFO] [stdout]     |
[INFO] [stdout] 151 | /                         unimplemented!("
[INFO] [stdout] 152 | |                             this program crashed because the coder was too lazy to implement a specific case. sorry.
[INFO] [stdout] 153 | |                             okay but alright to be fair, recursive rules are unefficient when they have bodies.
[INFO] [stdout] 154 | |                         "); 
[INFO] [stdout]     | |___________________________- any code following this expression is unreachable
[INFO] [stdout] 155 |                           // the following code needs to be fixed by ...
[INFO] [stdout] 156 |                           for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `level` is never read
[INFO] [stdout]    --> src/mmatch/match_invocation_string.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |             level -= 1;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `frame_result` is never read
[INFO] [stdout]    --> src/mmatch/match_rule_variant.rs:115:25
[INFO] [stdout]     |
[INFO] [stdout] 115 |                     let mut frame_result = Ok(("", InvocStrResult::empty())); // result of current frame
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `body`
[INFO] [stdout]    --> src/mmatch/match_rule_variant.rs:150:33
[INFO] [stdout]     |
[INFO] [stdout] 150 |                     if let Some(body) = &self.body {
[INFO] [stdout]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_body`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/mmatch/match_rule_variant.rs:168:33
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[INFO] [stdout]     |                                 ----^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `parse_header` in this scope
[INFO] [stdout]   --> src/mmatch/match_rule.rs:77:17
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 parse_header("::digit").unwrap(), None
[INFO] [stdout]    |                 ^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `parse_header` in this scope
[INFO] [stdout]   --> src/mmatch/match_rule.rs:80:17
[INFO] [stdout]    |
[INFO] [stdout] 80 |                 parse_header(":d:digit::digits").unwrap(),
[INFO] [stdout]    |                 ^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `parse_body` in this scope
[INFO] [stdout]   --> src/mmatch/match_rule.rs:81:22
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 Some(parse_body("Two .times: :d:d").unwrap()),
[INFO] [stdout]    |                      ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `first` should have an upper case name
[INFO] [stdout]  --> src/mmatch/match_rule_variant.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | static mut first: bool = true;
[INFO] [stdout]   |            ^^^^^ help: convert the identifier to upper case: `FIRST`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/mmatch/match_rule_variant.rs:156:58
[INFO] [stdout]     |
[INFO] [stdout] 151 | /                         unimplemented!("
[INFO] [stdout] 152 | |                             this program crashed because the coder was too lazy to implement a specific case. sorry.
[INFO] [stdout] 153 | |                             okay but alright to be fair, recursive rules are unefficient when they have bodies.
[INFO] [stdout] 154 | |                         "); 
[INFO] [stdout]     | |___________________________- any code following this expression is unreachable
[INFO] [stdout] 155 |                           // the following code needs to be fixed by ...
[INFO] [stdout] 156 |                           for (_, mut invoc_str_result) in frame_stack.drain(..).rev() {
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/types/invocation_string.rs:142:82
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let header = match_invocation_string_def("{::expr {' or '} ::or}", '{', '}', WhiteSpaceHandling::Remove)  .unwrap().1.unwrap();
[INFO] [stdout]     |                                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                                                  |
[INFO] [stdout]     |                                                                                  expected `&mmatch::match_invocation_string::WhiteSpaceHandling`, found enum `mmatch::match_invocation_string::WhiteSpaceHandling`
[INFO] [stdout]     |                                                                                  help: consider borrowing here: `&WhiteSpaceHandling::Remove`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `swirl`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1602c172ad8694754f792fafd1b1801e6cfed617796186c3ba7ed6c0f15e8c80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1602c172ad8694754f792fafd1b1801e6cfed617796186c3ba7ed6c0f15e8c80", kill_on_drop: false }`
[INFO] [stdout] 1602c172ad8694754f792fafd1b1801e6cfed617796186c3ba7ed6c0f15e8c80
