[INFO] cloning repository https://github.com/integrational/rust-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/integrational/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fintegrational%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fintegrational%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3735d41deaa0e5f5262c29955d4b09b4ffe02434
[INFO] checking integrational/rust-exercises against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fintegrational%2Frust-exercises" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/integrational/rust-exercises on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/integrational/rust-exercises
[INFO] finished tweaking git repo https://github.com/integrational/rust-exercises
[INFO] tweaked toml for git repo https://github.com/integrational/rust-exercises written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/integrational/rust-exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33d1badeeb9d6b9b902ce47ea39cb183efe774f04f4c9b7770a503996a4cf77f
[INFO] running `Command { std: "docker" "start" "-a" "33d1badeeb9d6b9b902ce47ea39cb183efe774f04f4c9b7770a503996a4cf77f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33d1badeeb9d6b9b902ce47ea39cb183efe774f04f4c9b7770a503996a4cf77f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33d1badeeb9d6b9b902ce47ea39cb183efe774f04f4c9b7770a503996a4cf77f", kill_on_drop: false }`
[INFO] [stdout] 33d1badeeb9d6b9b902ce47ea39cb183efe774f04f4c9b7770a503996a4cf77f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c40bcb3459fed2f49238ad6904117bd7dc3eac6fd03502284e3e1d2daba4d4c9
[INFO] running `Command { std: "docker" "start" "-a" "c40bcb3459fed2f49238ad6904117bd7dc3eac6fd03502284e3e1d2daba4d4c9", kill_on_drop: false }`
[INFO] [stderr]     Checking exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/pig_latin.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 31 |         match (&self.state, is_word_char(c)) {
[INFO] [stdout]    |                ----------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 39 |                 self.push_word_suffix(*firstc);
[INFO] [stdout]    |                 ^^^^                  ------- immutable borrow later used here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/pig_latin.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 31 |         match (&self.state, is_word_char(c)) {
[INFO] [stdout]    |                ----------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 39 |                 self.push_word_suffix(*firstc);
[INFO] [stdout]    |                 ^^^^                  ------- immutable borrow later used here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "c40bcb3459fed2f49238ad6904117bd7dc3eac6fd03502284e3e1d2daba4d4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c40bcb3459fed2f49238ad6904117bd7dc3eac6fd03502284e3e1d2daba4d4c9", kill_on_drop: false }`
[INFO] [stdout] c40bcb3459fed2f49238ad6904117bd7dc3eac6fd03502284e3e1d2daba4d4c9