[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] e2b6608d96a3b0a3d68acb5e6f7a9b7ee7ae3b7f
[INFO] checking m-bra/swirl against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm-bra%2Fswirl" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/m-bra/swirl on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5831d9a5ca8c75e37f41ce03c67e16199abe5ea7ef3d21f1e2c35258414b1f07
[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" "5831d9a5ca8c75e37f41ce03c67e16199abe5ea7ef3d21f1e2c35258414b1f07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5831d9a5ca8c75e37f41ce03c67e16199abe5ea7ef3d21f1e2c35258414b1f07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5831d9a5ca8c75e37f41ce03c67e16199abe5ea7ef3d21f1e2c35258414b1f07", kill_on_drop: false }`
[INFO] [stdout] 5831d9a5ca8c75e37f41ce03c67e16199abe5ea7ef3d21f1e2c35258414b1f07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4c3e5c0339f1f9df0e99dad1f36e6411d164d08e112bf9d9cef68cdb27f0195e
[INFO] running `Command { std: "docker" "start" "-a" "4c3e5c0339f1f9df0e99dad1f36e6411d164d08e112bf9d9cef68cdb27f0195e", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling const_fn v0.4.3
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v1.0.51
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking finally-block v0.2.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.4
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking swirl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `level` is never read
[INFO] [stdout]    --> src/mmatch/match_invocation_string.rs:250:13
[INFO] [stdout]     |
[INFO] [stdout] 250 |             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:122:25
[INFO] [stdout]     |
[INFO] [stdout] 122 |                     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: `recursion_var`
[INFO] [stdout]   --> src/mmatch/match_rule_variant.rs:98:22
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let (recursion_var, recursive_param) = match unsafe { self.header().end_invocation().unwrap() } {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recursion_var`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule_name`
[INFO] [stdout]    --> src/types/rule_variant.rs:115:30
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn on_success(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rule_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/types/rule_variant.rs:115:47
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn on_success(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule_name`
[INFO] [stdout]    --> src/types/rule_variant.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn on_failure(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rule_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/types/rule_variant.rs:127:47
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn on_failure(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `level` is never read
[INFO] [stdout]    --> src/mmatch/match_invocation_string.rs:250:13
[INFO] [stdout]     |
[INFO] [stdout] 250 |             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:122:25
[INFO] [stdout]     |
[INFO] [stdout] 122 |                     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: `recursion_var`
[INFO] [stdout]   --> src/mmatch/match_rule_variant.rs:98:22
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let (recursion_var, recursive_param) = match unsafe { self.header().end_invocation().unwrap() } {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recursion_var`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule_name`
[INFO] [stdout]    --> src/types/rule_variant.rs:115:30
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn on_success(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rule_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/types/rule_variant.rs:115:47
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn on_success(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule_name`
[INFO] [stdout]    --> src/types/rule_variant.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn on_failure(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rule_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/types/rule_variant.rs:127:47
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn on_failure(&self, rule_name: &str, input: &str) {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[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: 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: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 54.70s
[INFO] running `Command { std: "docker" "inspect" "4c3e5c0339f1f9df0e99dad1f36e6411d164d08e112bf9d9cef68cdb27f0195e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3e5c0339f1f9df0e99dad1f36e6411d164d08e112bf9d9cef68cdb27f0195e", kill_on_drop: false }`
[INFO] [stdout] 4c3e5c0339f1f9df0e99dad1f36e6411d164d08e112bf9d9cef68cdb27f0195e