[INFO] fetching crate remain 0.2.11...
[INFO] testing remain-0.2.11 against 1.76.0 for beta-1.77-1
[INFO] extracting crate remain 0.2.11 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate remain 0.2.11 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate remain 0.2.11
[INFO] finished tweaking crates.io crate remain 0.2.11
[INFO] tweaked toml for crates.io crate remain 0.2.11 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 388c687859deb66fe5f3ca966bed5e284ed9e92cf6692d028ebf79ad2fbcdd37
[INFO] running `Command { std: "docker" "start" "-a" "388c687859deb66fe5f3ca966bed5e284ed9e92cf6692d028ebf79ad2fbcdd37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "388c687859deb66fe5f3ca966bed5e284ed9e92cf6692d028ebf79ad2fbcdd37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388c687859deb66fe5f3ca966bed5e284ed9e92cf6692d028ebf79ad2fbcdd37", kill_on_drop: false }`
[INFO] [stdout] 388c687859deb66fe5f3ca966bed5e284ed9e92cf6692d028ebf79ad2fbcdd37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83dd18d53c31ce83c4cc738a083c9134341a3ec554940dd8a11394aa476072b0
[INFO] running `Command { std: "docker" "start" "-a" "83dd18d53c31ce83c4cc738a083c9134341a3ec554940dd8a11394aa476072b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling remain v0.2.11 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.55s
[INFO] running `Command { std: "docker" "inspect" "83dd18d53c31ce83c4cc738a083c9134341a3ec554940dd8a11394aa476072b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83dd18d53c31ce83c4cc738a083c9134341a3ec554940dd8a11394aa476072b0", kill_on_drop: false }`
[INFO] [stdout] 83dd18d53c31ce83c4cc738a083c9134341a3ec554940dd8a11394aa476072b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5dfc87935a41cfd8eca3a9f63190f5270a55f5d5606b3c7707f7f9b88d0cc50a
[INFO] running `Command { std: "docker" "start" "-a" "5dfc87935a41cfd8eca3a9f63190f5270a55f5d5606b3c7707f7f9b88d0cc50a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling trybuild v1.0.89
[INFO] [stderr]    Compiling dissimilar v1.0.7
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling basic-toml v0.1.8
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling remain v0.2.11 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> tests/unstable.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_hygiene, stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `remain` (test "unstable") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5dfc87935a41cfd8eca3a9f63190f5270a55f5d5606b3c7707f7f9b88d0cc50a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dfc87935a41cfd8eca3a9f63190f5270a55f5d5606b3c7707f7f9b88d0cc50a", kill_on_drop: false }`
[INFO] [stdout] 5dfc87935a41cfd8eca3a9f63190f5270a55f5d5606b3c7707f7f9b88d0cc50a
