[INFO] fetching crate trait_len 0.2.12...
[INFO] checking trait_len-0.2.12 against 1.95.0 for pr-155915
[INFO] extracting crate trait_len 0.2.12 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate trait_len 0.2.12
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate trait_len 0.2.12
[INFO] tweaked toml for crates.io crate trait_len 0.2.12 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate trait_len 0.2.12 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]     Updating crates.io index
[INFO] [stderr]      Locking 49 packages to latest compatible versions
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ef050e35c338ff586b75d4361c5d38f48d09caeb5e3a7a18f0df33b1a97d19dd
[INFO] running `Command { std: "docker" "start" "-a" "ef050e35c338ff586b75d4361c5d38f48d09caeb5e3a7a18f0df33b1a97d19dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef050e35c338ff586b75d4361c5d38f48d09caeb5e3a7a18f0df33b1a97d19dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef050e35c338ff586b75d4361c5d38f48d09caeb5e3a7a18f0df33b1a97d19dd", kill_on_drop: false }`
[INFO] [stdout] ef050e35c338ff586b75d4361c5d38f48d09caeb5e3a7a18f0df33b1a97d19dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bb990e4209ca59e06eb86a48de46c76a112bf5c354725b1643821676e8872d6d
[INFO] running `Command { std: "docker" "start" "-a" "bb990e4209ca59e06eb86a48de46c76a112bf5c354725b1643821676e8872d6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling static_init v1.0.4
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking trait_len v0.2.12 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking aok v0.1.18
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling static_init_macro v1.0.4
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `trait_len` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "bb990e4209ca59e06eb86a48de46c76a112bf5c354725b1643821676e8872d6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb990e4209ca59e06eb86a48de46c76a112bf5c354725b1643821676e8872d6d", kill_on_drop: false }`
[INFO] [stdout] bb990e4209ca59e06eb86a48de46c76a112bf5c354725b1643821676e8872d6d
