[INFO] fetching crate ruspiro-singleton 0.4.2...
[INFO] testing ruspiro-singleton-0.4.2 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate ruspiro-singleton 0.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ruspiro-singleton 0.4.2 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruspiro-singleton 0.4.2
[INFO] finished tweaking crates.io crate ruspiro-singleton 0.4.2
[INFO] tweaked toml for crates.io crate ruspiro-singleton 0.4.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55dfbaaddb4252f3321f55cc03ecb8028915535b520f64fc08291828148e7825
[INFO] running `Command { std: "docker" "start" "-a" "55dfbaaddb4252f3321f55cc03ecb8028915535b520f64fc08291828148e7825", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55dfbaaddb4252f3321f55cc03ecb8028915535b520f64fc08291828148e7825", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55dfbaaddb4252f3321f55cc03ecb8028915535b520f64fc08291828148e7825", kill_on_drop: false }`
[INFO] [stdout] 55dfbaaddb4252f3321f55cc03ecb8028915535b520f64fc08291828148e7825
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e9fe57bd32b66ed0b75aadb5d6528974b2852d967590469badaab05a7ba1c5a
[INFO] running `Command { std: "docker" "start" "-a" "8e9fe57bd32b66ed0b75aadb5d6528974b2852d967590469badaab05a7ba1c5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruspiro-singleton v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruspiro-singleton` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8e9fe57bd32b66ed0b75aadb5d6528974b2852d967590469badaab05a7ba1c5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e9fe57bd32b66ed0b75aadb5d6528974b2852d967590469badaab05a7ba1c5a", kill_on_drop: false }`
[INFO] [stdout] 8e9fe57bd32b66ed0b75aadb5d6528974b2852d967590469badaab05a7ba1c5a