[INFO] fetching crate iset 0.0.5...
[INFO] checking iset-0.0.5 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate iset 0.0.5 into /workspace/builds/worker-66/source
[INFO] validating manifest of crates.io crate iset 0.0.5 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 crates.io crate iset 0.0.5
[INFO] finished tweaking crates.io crate iset 0.0.5
[INFO] tweaked toml for crates.io crate iset 0.0.5 written to /workspace/builds/worker-66/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[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] 0ea0d0afa00af5184d60944e797d21a175f68bb32bb58b8d4ad147f1b0f3b46f
[INFO] running `Command { std: "docker" "start" "-a" "0ea0d0afa00af5184d60944e797d21a175f68bb32bb58b8d4ad147f1b0f3b46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ea0d0afa00af5184d60944e797d21a175f68bb32bb58b8d4ad147f1b0f3b46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ea0d0afa00af5184d60944e797d21a175f68bb32bb58b8d4ad147f1b0f3b46f", kill_on_drop: false }`
[INFO] [stdout] 0ea0d0afa00af5184d60944e797d21a175f68bb32bb58b8d4ad147f1b0f3b46f
[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] 26b1785d8821c018090a3ce63e3fe888f28ccc2bc49324f9f7aa482082c0b17f
[INFO] running `Command { std: "docker" "start" "-a" "26b1785d8821c018090a3ce63e3fe888f28ccc2bc49324f9f7aa482082c0b17f", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.128
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking iset v0.0.5 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stdout] warning: function is never used: `compare_iterators`
[INFO] [stdout]    --> src/tests.rs:241:4
[INFO] [stdout]     |
[INFO] [stdout] 241 | fn compare_iterators<T, I, J>(mut iter1: I, mut iter2: J, history: &str)
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 10.45s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking iset v0.0.5 (/tmp/fixit)
[INFO] [stdout] warning: function is never used: `compare_iterators`
[INFO] [stdout]    --> src/tests.rs:241:4
[INFO] [stdout]     |
[INFO] [stdout] 241 | fn compare_iterators<T, I, J>(mut iter1: I, mut iter2: J, history: &str)
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "26b1785d8821c018090a3ce63e3fe888f28ccc2bc49324f9f7aa482082c0b17f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26b1785d8821c018090a3ce63e3fe888f28ccc2bc49324f9f7aa482082c0b17f", kill_on_drop: false }`
[INFO] [stdout] 26b1785d8821c018090a3ce63e3fe888f28ccc2bc49324f9f7aa482082c0b17f