[INFO] cloning repository https://github.com/charliemonnone/png-me
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/charliemonnone/png-me" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharliemonnone%2Fpng-me", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharliemonnone%2Fpng-me'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a511da8d1a5e2f828a0f9028b0f4a5303b8319b3
[INFO] checking charliemonnone/png-me against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharliemonnone%2Fpng-me" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/charliemonnone/png-me on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/charliemonnone/png-me
[INFO] finished tweaking git repo https://github.com/charliemonnone/png-me
[INFO] tweaked toml for git repo https://github.com/charliemonnone/png-me written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/charliemonnone/png-me already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking charliemonnone/png-me against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcharliemonnone%2Fpng-me" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/charliemonnone/png-me on toolchain 047472f299946caf090d1b5608ae4bd9f0416256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/charliemonnone/png-me
[INFO] finished tweaking git repo https://github.com/charliemonnone/png-me
[INFO] tweaked toml for git repo https://github.com/charliemonnone/png-me written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/charliemonnone/png-me already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05b8477219d7d7682c61841659203c56b771a7340a255663beb6683fc82c2948
[INFO] running `Command { std: "docker" "start" "-a" "05b8477219d7d7682c61841659203c56b771a7340a255663beb6683fc82c2948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05b8477219d7d7682c61841659203c56b771a7340a255663beb6683fc82c2948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05b8477219d7d7682c61841659203c56b771a7340a255663beb6683fc82c2948", kill_on_drop: false }`
[INFO] [stdout] 05b8477219d7d7682c61841659203c56b771a7340a255663beb6683fc82c2948
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Ddereferencing_mut_binding" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 834a0bbf47c0b9a77a2d6ce081743f45c64b4787f9a1769d4ec91193745ad4ae
[INFO] running `Command { std: "docker" "start" "-a" "834a0bbf47c0b9a77a2d6ce081743f45c64b4787f9a1769d4ec91193745ad4ae", kill_on_drop: false }`
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]     Checking png-me v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `U8_FIRST_BIT_MASK`, `is_valid`, `is_critical`, `is_public`, `is_reserved_bit_valid`, and `is_safe_to_copy` are never used
[INFO] [stdout]   --> src/chunk_type.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl ChunkType {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 45 |     const U8_FIRST_BIT_MASK: u8 = 0x1;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn is_critical(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn is_public(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn is_reserved_bit_valid(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn is_safe_to_copy(&self) -> bool {
[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 [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "834a0bbf47c0b9a77a2d6ce081743f45c64b4787f9a1769d4ec91193745ad4ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "834a0bbf47c0b9a77a2d6ce081743f45c64b4787f9a1769d4ec91193745ad4ae", kill_on_drop: false }`
[INFO] [stdout] 834a0bbf47c0b9a77a2d6ce081743f45c64b4787f9a1769d4ec91193745ad4ae