[INFO] fetching crate concise_vec 0.2.0...
[INFO] checking concise_vec-0.2.0 against 1.95.0 for pr-155915
[INFO] extracting crate concise_vec 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate concise_vec 0.2.0
[INFO] finished tweaking crates.io crate concise_vec 0.2.0
[INFO] tweaked toml for crates.io crate concise_vec 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate concise_vec 0.2.0 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] crate crates.io crate concise_vec 0.2.0 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] 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] e21149fd57985c9de2ab5cf01f2f401ecb34557f610ed68b5f605caaa0dd4afe
[INFO] running `Command { std: "docker" "start" "-a" "e21149fd57985c9de2ab5cf01f2f401ecb34557f610ed68b5f605caaa0dd4afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e21149fd57985c9de2ab5cf01f2f401ecb34557f610ed68b5f605caaa0dd4afe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e21149fd57985c9de2ab5cf01f2f401ecb34557f610ed68b5f605caaa0dd4afe", kill_on_drop: false }`
[INFO] [stdout] e21149fd57985c9de2ab5cf01f2f401ecb34557f610ed68b5f605caaa0dd4afe
[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] 5ccd02e461b3018bc2cb14d32a05ca84b5e1ae2f4ae0e32a562c56c5d9a6d9ba
[INFO] running `Command { std: "docker" "start" "-a" "5ccd02e461b3018bc2cb14d32a05ca84b5e1ae2f4ae0e32a562c56c5d9a6d9ba", kill_on_drop: false }`
[INFO] [stderr]     Checking concise_vec v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout]  2 | / #![feature(
[INFO] [stdout]  3 | |     const_cmp,
[INFO] [stdout]  4 | |     const_default,
[INFO] [stdout]  5 | |     const_destruct,
[INFO] [stdout] ...  |
[INFO] [stdout]  9 | |     generic_const_exprs
[INFO] [stdout] 10 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout]  2 | / #![feature(
[INFO] [stdout]  3 | |     const_cmp,
[INFO] [stdout]  4 | |     const_default,
[INFO] [stdout]  5 | |     const_destruct,
[INFO] [stdout] ...  |
[INFO] [stdout]  9 | |     generic_const_exprs
[INFO] [stdout] 10 | | )]
[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 `concise_vec` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `concise_vec` (lib test) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5ccd02e461b3018bc2cb14d32a05ca84b5e1ae2f4ae0e32a562c56c5d9a6d9ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ccd02e461b3018bc2cb14d32a05ca84b5e1ae2f4ae0e32a562c56c5d9a6d9ba", kill_on_drop: false }`
[INFO] [stdout] 5ccd02e461b3018bc2cb14d32a05ca84b5e1ae2f4ae0e32a562c56c5d9a6d9ba
