[INFO] fetching crate lodepng 3.4.0...
[INFO] checking lodepng-3.4.0 against master#339e19697a39a78f4d669c217b7d21109215de41 for pr-81213
[INFO] extracting crate lodepng 3.4.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate lodepng 3.4.0 on toolchain 339e19697a39a78f4d669c217b7d21109215de41
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lodepng 3.4.0
[INFO] finished tweaking crates.io crate lodepng 3.4.0
[INFO] tweaked toml for crates.io crate lodepng 3.4.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate lodepng 3.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "fetch" "--locked" "--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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 825e776b7b6c35aa27d28c05b50e7b19d64315213dab4383a34c885b8bba7230
[INFO] running `Command { std: "docker" "start" "-a" "825e776b7b6c35aa27d28c05b50e7b19d64315213dab4383a34c885b8bba7230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "825e776b7b6c35aa27d28c05b50e7b19d64315213dab4383a34c885b8bba7230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825e776b7b6c35aa27d28c05b50e7b19d64315213dab4383a34c885b8bba7230", kill_on_drop: false }`
[INFO] [stdout] 825e776b7b6c35aa27d28c05b50e7b19d64315213dab4383a34c885b8bba7230
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 778951c03ae55db997f7e08da55527012e42c342ef011752248db91fc4c959cc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "778951c03ae55db997f7e08da55527012e42c342ef011752248db91fc4c959cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bytemuck v1.4.1
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking rgb v0.8.25
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking fallible_collections v0.3.1
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking lodepng v3.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/ffi.rs:694:5
[INFO] [stdout]     |
[INFO] [stdout] 694 |     rustimpl::chunk_append(&mut v, slice::from_raw_parts(chunk, 0x7FFF_FFFF));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/ffi.rs:694:5
[INFO] [stdout]     |
[INFO] [stdout] 694 |     rustimpl::chunk_append(&mut v, slice::from_raw_parts(chunk, 0x7FFF_FFFF));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[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 [optimized + debuginfo] target(s) in 7.28s
[INFO] running `Command { std: "docker" "inspect" "778951c03ae55db997f7e08da55527012e42c342ef011752248db91fc4c959cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "778951c03ae55db997f7e08da55527012e42c342ef011752248db91fc4c959cc", kill_on_drop: false }`
[INFO] [stdout] 778951c03ae55db997f7e08da55527012e42c342ef011752248db91fc4c959cc