[INFO] fetching crate prune_derive 0.1.6...
[INFO] checking prune_derive-0.1.6 against 1.95.0 for pr-155915
[INFO] extracting crate prune_derive 0.1.6 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate prune_derive 0.1.6
[INFO] finished tweaking crates.io crate prune_derive 0.1.6
[INFO] tweaked toml for crates.io crate prune_derive 0.1.6 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate prune_derive 0.1.6 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 11 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.106)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.45)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.117)
[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 prune v0.1.6
[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] d07a34b6bbc06ac1d787b3897201d8b62d0f2f7deafedc18e889b54053563f43
[INFO] running `Command { std: "docker" "start" "-a" "d07a34b6bbc06ac1d787b3897201d8b62d0f2f7deafedc18e889b54053563f43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d07a34b6bbc06ac1d787b3897201d8b62d0f2f7deafedc18e889b54053563f43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d07a34b6bbc06ac1d787b3897201d8b62d0f2f7deafedc18e889b54053563f43", kill_on_drop: false }`
[INFO] [stdout] d07a34b6bbc06ac1d787b3897201d8b62d0f2f7deafedc18e889b54053563f43
[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] 424f5a36ab163b6822dacf668a8418652069d1015dbda45bcfe49a6f22a193b3
[INFO] running `Command { std: "docker" "start" "-a" "424f5a36ab163b6822dacf668a8418652069d1015dbda45bcfe49a6f22a193b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking prune v0.1.6
[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/prune-0.1.6/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `prune` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "424f5a36ab163b6822dacf668a8418652069d1015dbda45bcfe49a6f22a193b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "424f5a36ab163b6822dacf668a8418652069d1015dbda45bcfe49a6f22a193b3", kill_on_drop: false }`
[INFO] [stdout] 424f5a36ab163b6822dacf668a8418652069d1015dbda45bcfe49a6f22a193b3