[INFO] cloning repository https://github.com/kgtkr/regex-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kgtkr/regex-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgtkr%2Fregex-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgtkr%2Fregex-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a1f3b0515afbee3a37f755ea2c9af759531fb3f1
[INFO] checking kgtkr/regex-rs against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgtkr%2Fregex-rs" "/workspace/builds/worker-66/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-66/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kgtkr/regex-rs on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kgtkr/regex-rs
[INFO] finished tweaking git repo https://github.com/kgtkr/regex-rs
[INFO] tweaked toml for git repo https://github.com/kgtkr/regex-rs written to /workspace/builds/worker-66/source/Cargo.toml
[INFO] crate git repo https://github.com/kgtkr/regex-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii v1.0.0
[INFO] [stderr]   Downloaded combine v4.0.0-beta.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe201a3c352874629d392cd135caf861c4a055998db85d3d7d6369ee17bacb3c
[INFO] running `Command { std: "docker" "start" "-a" "fe201a3c352874629d392cd135caf861c4a055998db85d3d7d6369ee17bacb3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe201a3c352874629d392cd135caf861c4a055998db85d3d7d6369ee17bacb3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe201a3c352874629d392cd135caf861c4a055998db85d3d7d6369ee17bacb3c", kill_on_drop: false }`
[INFO] [stdout] fe201a3c352874629d392cd135caf861c4a055998db85d3d7d6369ee17bacb3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-66/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93237a554cd383b60be049901117a48ddcc472c5f6583cb679a014b163821c12
[INFO] running `Command { std: "docker" "start" "-a" "93237a554cd383b60be049901117a48ddcc472c5f6583cb679a014b163821c12", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking combine v4.0.0-beta.1
[INFO] [stderr]     Checking regex-rs v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: function is never used: `match_expr`
[INFO] [stdout]  --> src/interpreter.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn match_expr(pat: &Expr, s: &str) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_helper`
[INFO] [stdout]  --> src/interpreter.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn match_helper(s: &Vec<char>, i: usize, pat: &Expr) -> Option<usize> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_expr`
[INFO] [stdout]  --> src/parser.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn parse_expr(s: &str) -> Option<Expr> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(maybe_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(maybe_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.20s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking regex-rs v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: function is never used: `match_expr`
[INFO] [stdout]  --> src/interpreter.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn match_expr(pat: &Expr, s: &str) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_helper`
[INFO] [stdout]  --> src/interpreter.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn match_helper(s: &Vec<char>, i: usize, pat: &Expr) -> Option<usize> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_expr`
[INFO] [stdout]  --> src/parser.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn parse_expr(s: &str) -> Option<Expr> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(maybe_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(maybe_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "93237a554cd383b60be049901117a48ddcc472c5f6583cb679a014b163821c12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93237a554cd383b60be049901117a48ddcc472c5f6583cb679a014b163821c12", kill_on_drop: false }`
[INFO] [stdout] 93237a554cd383b60be049901117a48ddcc472c5f6583cb679a014b163821c12