[INFO] fetching crate pngenc 0.1.1...
[INFO] checking pngenc-0.1.1 against 1.95.0 for pr-155915
[INFO] extracting crate pngenc 0.1.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate pngenc 0.1.1
[INFO] finished tweaking crates.io crate pngenc 0.1.1
[INFO] tweaked toml for crates.io crate pngenc 0.1.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pngenc 0.1.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pngenc 0.1.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atools v0.1.1
[INFO] [stderr]   Downloaded array_chunks v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fb2387c51303b16817e8b2f4c82b127c9b9e2472b5c21a22ace49248292c203
[INFO] running `Command { std: "docker" "start" "-a" "5fb2387c51303b16817e8b2f4c82b127c9b9e2472b5c21a22ace49248292c203", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fb2387c51303b16817e8b2f4c82b127c9b9e2472b5c21a22ace49248292c203", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fb2387c51303b16817e8b2f4c82b127c9b9e2472b5c21a22ace49248292c203", kill_on_drop: false }`
[INFO] [stdout] 5fb2387c51303b16817e8b2f4c82b127c9b9e2472b5c21a22ace49248292c203
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1304815626002860f9e418ce7cb8f3f6156ab03a9f3a43b3a3b8ff950647376
[INFO] running `Command { std: "docker" "start" "-a" "c1304815626002860f9e418ce7cb8f3f6156ab03a9f3a43b3a3b8ff950647376", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking atools v0.1.1
[INFO] [stderr]     Checking array_chunks v1.0.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/atools-0.1.1/src/lib.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout]  4 | / #![feature(
[INFO] [stdout]  5 | |     generic_const_exprs,
[INFO] [stdout]  6 | |     core_intrinsics,
[INFO] [stdout]  7 | |     iter_intersperse,
[INFO] [stdout] ...  |
[INFO] [stdout] 11 | |     iter_map_windows
[INFO] [stdout] 12 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `inline_const` has been stable since `1.79.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `atools` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c1304815626002860f9e418ce7cb8f3f6156ab03a9f3a43b3a3b8ff950647376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1304815626002860f9e418ce7cb8f3f6156ab03a9f3a43b3a3b8ff950647376", kill_on_drop: false }`
[INFO] [stdout] c1304815626002860f9e418ce7cb8f3f6156ab03a9f3a43b3a3b8ff950647376