[INFO] fetching crate pngenc 0.1.0...
[INFO] testing pngenc-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate pngenc 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate pngenc 0.1.0
[INFO] finished tweaking crates.io crate pngenc 0.1.0
[INFO] tweaked toml for crates.io crate pngenc 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pngenc 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding png v0.17.16 (available: v0.18.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atools v0.1.10
[INFO] [stderr]   Downloaded crc32c v0.6.8
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5c09f8b338680f3cc0e53415455929f80ff9167dc34ec791de786e4b1464d5f
[INFO] running `Command { std: "docker" "start" "-a" "e5c09f8b338680f3cc0e53415455929f80ff9167dc34ec791de786e4b1464d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5c09f8b338680f3cc0e53415455929f80ff9167dc34ec791de786e4b1464d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5c09f8b338680f3cc0e53415455929f80ff9167dc34ec791de786e4b1464d5f", kill_on_drop: false }`
[INFO] [stdout] e5c09f8b338680f3cc0e53415455929f80ff9167dc34ec791de786e4b1464d5f
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24ebcd1206ae232e2aff7c70827a4b40e4cacf29223aada4a914d2f83c77b96d
[INFO] running `Command { std: "docker" "start" "-a" "24ebcd1206ae232e2aff7c70827a4b40e4cacf29223aada4a914d2f83c77b96d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]    Compiling atools v0.1.10
[INFO] [stderr]    Compiling crc32c v0.6.8
[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-0.1.10/src/lib.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout]  4 | / #![feature(
[INFO] [stdout]  5 | |     const_destruct,
[INFO] [stdout]  6 | |     adt_const_params,
[INFO] [stdout]  7 | |     generic_const_exprs,
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |     iter_map_windows
[INFO] [stdout] 14 | | )]
[INFO] [stdout]    | |__^
[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" "24ebcd1206ae232e2aff7c70827a4b40e4cacf29223aada4a914d2f83c77b96d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24ebcd1206ae232e2aff7c70827a4b40e4cacf29223aada4a914d2f83c77b96d", kill_on_drop: false }`
[INFO] [stdout] 24ebcd1206ae232e2aff7c70827a4b40e4cacf29223aada4a914d2f83c77b96d
