[INFO] fetching crate thwack 0.4.3...
[INFO] checking thwack-0.4.3 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate thwack 0.4.3 into /workspace/builds/worker-71/source
[INFO] validating manifest of crates.io crate thwack 0.4.3 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thwack 0.4.3
[INFO] finished tweaking crates.io crate thwack 0.4.3
[INFO] tweaked toml for crates.io crate thwack 0.4.3 written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] crate crates.io crate thwack 0.4.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a4a7167cd2fe454331cc2b69a01f9732a4adcbf887823506977c60886c7d45c
[INFO] running `Command { std: "docker" "start" "-a" "1a4a7167cd2fe454331cc2b69a01f9732a4adcbf887823506977c60886c7d45c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a4a7167cd2fe454331cc2b69a01f9732a4adcbf887823506977c60886c7d45c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a4a7167cd2fe454331cc2b69a01f9732a4adcbf887823506977c60886c7d45c", kill_on_drop: false }`
[INFO] [stdout] 1a4a7167cd2fe454331cc2b69a01f9732a4adcbf887823506977c60886c7d45c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 823c695d0748a9b7eac72ee3e8b9a69b83aeee92c8c49b6837be8c3fb00cff46
[INFO] running `Command { std: "docker" "start" "-a" "823c695d0748a9b7eac72ee3e8b9a69b83aeee92c8c49b6837be8c3fb00cff46", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking crossterm v0.21.0
[INFO] [stderr]     Checking thwack v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/helper.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         &self.inner.iter().for_each(|v| {
[INFO] [stdout] 66 | |             for e in escape_default(*v) {
[INFO] [stdout] 67 | |                 buf.push(e);
[INFO] [stdout] 68 | |             }
[INFO] [stdout] 69 | |         });
[INFO] [stdout]    | |__________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = &self.inner.iter().for_each(|v| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/helper.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         &self.inner.iter().for_each(|v| {
[INFO] [stdout] 66 | |             for e in escape_default(*v) {
[INFO] [stdout] 67 | |                 buf.push(e);
[INFO] [stdout] 68 | |             }
[INFO] [stdout] 69 | |         });
[INFO] [stdout]    | |__________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = &self.inner.iter().for_each(|v| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/helper.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         &self.inner.iter().for_each(|v| {
[INFO] [stdout] 66 | |             for e in escape_default(*v) {
[INFO] [stdout] 67 | |                 buf.push(e);
[INFO] [stdout] 68 | |             }
[INFO] [stdout] 69 | |         });
[INFO] [stdout]    | |__________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = &self.inner.iter().for_each(|v| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/helper.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 | /         &self.inner.iter().for_each(|v| {
[INFO] [stdout] 66 | |             for e in escape_default(*v) {
[INFO] [stdout] 67 | |                 buf.push(e);
[INFO] [stdout] 68 | |             }
[INFO] [stdout] 69 | |         });
[INFO] [stdout]    | |__________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = &self.inner.iter().for_each(|v| {
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.80s
[INFO] running `Command { std: "docker" "inspect" "823c695d0748a9b7eac72ee3e8b9a69b83aeee92c8c49b6837be8c3fb00cff46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823c695d0748a9b7eac72ee3e8b9a69b83aeee92c8c49b6837be8c3fb00cff46", kill_on_drop: false }`
[INFO] [stdout] 823c695d0748a9b7eac72ee3e8b9a69b83aeee92c8c49b6837be8c3fb00cff46