[INFO] cloning repository https://github.com/gibsonjareds/project-euler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gibsonjareds/project-euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgibsonjareds%2Fproject-euler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgibsonjareds%2Fproject-euler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5746e281114a09a78d1073808eaef69537a4876a
[INFO] testing gibsonjareds/project-euler against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgibsonjareds%2Fproject-euler" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gibsonjareds/project-euler
[INFO] finished tweaking git repo https://github.com/gibsonjareds/project-euler
[INFO] tweaked toml for git repo https://github.com/gibsonjareds/project-euler written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gibsonjareds/project-euler on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gibsonjareds/project-euler 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33922f3dc489857b25fe161db94abda69fa5042ec172174b90e7538be34aab09
[INFO] running `Command { std: "docker" "start" "-a" "33922f3dc489857b25fe161db94abda69fa5042ec172174b90e7538be34aab09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33922f3dc489857b25fe161db94abda69fa5042ec172174b90e7538be34aab09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33922f3dc489857b25fe161db94abda69fa5042ec172174b90e7538be34aab09", kill_on_drop: false }`
[INFO] [stdout] 33922f3dc489857b25fe161db94abda69fa5042ec172174b90e7538be34aab09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 0d8f53425ac78d46f5ff8c68705555c4ab8ae93ba6831a19267de62b255034dc
[INFO] running `Command { std: "docker" "start" "-a" "0d8f53425ac78d46f5ff8c68705555c4ab8ae93ba6831a19267de62b255034dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling utils v0.0.1 (/opt/rustwide/workdir/src/utils)
[INFO] [stderr]    Compiling problem6 v0.0.1 (/opt/rustwide/workdir/src/problem6)
[INFO] [stderr]    Compiling problem2 v0.0.1 (/opt/rustwide/workdir/src/problem2)
[INFO] [stderr]    Compiling problem4 v0.0.1 (/opt/rustwide/workdir/src/problem4)
[INFO] [stderr]    Compiling problem1 v0.0.1 (/opt/rustwide/workdir/src/problem1)
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/utils/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `utils` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0d8f53425ac78d46f5ff8c68705555c4ab8ae93ba6831a19267de62b255034dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d8f53425ac78d46f5ff8c68705555c4ab8ae93ba6831a19267de62b255034dc", kill_on_drop: false }`
[INFO] [stdout] 0d8f53425ac78d46f5ff8c68705555c4ab8ae93ba6831a19267de62b255034dc