[INFO] fetching crate regex-syntax 0.7.2...
[INFO] checking regex-syntax-0.7.2 against try#024378d9203a4009ed73d6db2681b88a8d74ce7a for pr-112160
[INFO] extracting crate regex-syntax 0.7.2 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate regex-syntax 0.7.2 on toolchain 024378d9203a4009ed73d6db2681b88a8d74ce7a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate regex-syntax 0.7.2
[INFO] finished tweaking crates.io crate regex-syntax 0.7.2
[INFO] tweaked toml for crates.io crate regex-syntax 0.7.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93e677312ba5a9f09340cf2e1a313d5a3d900d1946824f261b022d74fc490d2e
[INFO] running `Command { std: "docker" "start" "-a" "93e677312ba5a9f09340cf2e1a313d5a3d900d1946824f261b022d74fc490d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93e677312ba5a9f09340cf2e1a313d5a3d900d1946824f261b022d74fc490d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93e677312ba5a9f09340cf2e1a313d5a3d900d1946824f261b022d74fc490d2e", kill_on_drop: false }`
[INFO] [stdout] 93e677312ba5a9f09340cf2e1a313d5a3d900d1946824f261b022d74fc490d2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+024378d9203a4009ed73d6db2681b88a8d74ce7a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ab0f0438962b4d14d515e54d52aef6b47ab6134c3c09cceacf2fb77dfdcb59a
[INFO] running `Command { std: "docker" "start" "-a" "1ab0f0438962b4d14d515e54d52aef6b47ab6134c3c09cceacf2fb77dfdcb59a", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.7.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ast/parse.rs:386:21
[INFO] [stdout]     |
[INFO] [stdout] 386 |         self.pattern.borrow()
[INFO] [stdout]     |                     ^^^^^^^^^ unnecessary method call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[deny(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex-syntax` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/ast/parse.rs:386:21
[INFO] [stdout]     |
[INFO] [stdout] 386 |         self.pattern.borrow()
[INFO] [stdout]     |                     ^^^^^^^^^ unnecessary method call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[deny(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex-syntax` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1ab0f0438962b4d14d515e54d52aef6b47ab6134c3c09cceacf2fb77dfdcb59a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ab0f0438962b4d14d515e54d52aef6b47ab6134c3c09cceacf2fb77dfdcb59a", kill_on_drop: false }`
[INFO] [stdout] 1ab0f0438962b4d14d515e54d52aef6b47ab6134c3c09cceacf2fb77dfdcb59a