[INFO] fetching crate encoding-next-index-singlebyte 1.20180106.0...
[INFO] checking encoding-next-index-singlebyte-1.20180106.0 against 1.95.0 for pr-155915
[INFO] extracting crate encoding-next-index-singlebyte 1.20180106.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate encoding-next-index-singlebyte 1.20180106.0
[INFO] finished tweaking crates.io crate encoding-next-index-singlebyte 1.20180106.0
[INFO] tweaked toml for crates.io crate encoding-next-index-singlebyte 1.20180106.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate encoding-next-index-singlebyte 1.20180106.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded encoding-next_index_tests v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] c48ab2b721a5f8d966efe2c2e36ff6b8e6f0fd8247377cd812c33d53148a4633
[INFO] running `Command { std: "docker" "start" "-a" "c48ab2b721a5f8d966efe2c2e36ff6b8e6f0fd8247377cd812c33d53148a4633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c48ab2b721a5f8d966efe2c2e36ff6b8e6f0fd8247377cd812c33d53148a4633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c48ab2b721a5f8d966efe2c2e36ff6b8e6f0fd8247377cd812c33d53148a4633", kill_on_drop: false }`
[INFO] [stdout] c48ab2b721a5f8d966efe2c2e36ff6b8e6f0fd8247377cd812c33d53148a4633
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 2c782bf3023814d6a4fcdc4bd0810c76274bdeab7aaacc13ab3ca131a01d5bf8
[INFO] running `Command { std: "docker" "start" "-a" "2c782bf3023814d6a4fcdc4bd0810c76274bdeab7aaacc13ab3ca131a01d5bf8", kill_on_drop: false }`
[INFO] [stderr]     Checking encoding-next_index_tests v0.1.5
[INFO] [stderr]     Checking encoding-next-index-singlebyte v1.20180106.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lib.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![cfg_attr(test, feature(test))]
[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 `encoding-next-index-singlebyte` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "2c782bf3023814d6a4fcdc4bd0810c76274bdeab7aaacc13ab3ca131a01d5bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c782bf3023814d6a4fcdc4bd0810c76274bdeab7aaacc13ab3ca131a01d5bf8", kill_on_drop: false }`
[INFO] [stdout] 2c782bf3023814d6a4fcdc4bd0810c76274bdeab7aaacc13ab3ca131a01d5bf8
