[INFO] cloning repository https://github.com/reesmanp/evil_penguin_2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reesmanp/evil_penguin_2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freesmanp%2Fevil_penguin_2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freesmanp%2Fevil_penguin_2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38e20619dcaa2e60ab2f1f4376c545816b51463f
[INFO] testing reesmanp/evil_penguin_2 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freesmanp%2Fevil_penguin_2" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/reesmanp/evil_penguin_2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/reesmanp/evil_penguin_2
[INFO] finished tweaking git repo https://github.com/reesmanp/evil_penguin_2
[INFO] tweaked toml for git repo https://github.com/reesmanp/evil_penguin_2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/reesmanp/evil_penguin_2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ahash v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3f006f18c823582c2bf5a5bf8f7f83c4f9930f9852751100beb9a30fa52675c
[INFO] running `Command { std: "docker" "start" "-a" "a3f006f18c823582c2bf5a5bf8f7f83c4f9930f9852751100beb9a30fa52675c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3f006f18c823582c2bf5a5bf8f7f83c4f9930f9852751100beb9a30fa52675c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3f006f18c823582c2bf5a5bf8f7f83c4f9930f9852751100beb9a30fa52675c", kill_on_drop: false }`
[INFO] [stdout] a3f006f18c823582c2bf5a5bf8f7f83c4f9930f9852751100beb9a30fa52675c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f491bb7ca344e2b5c9399d1dbfaf1b22955edab7bd361ff65b4079bae40eb5b
[INFO] running `Command { std: "docker" "start" "-a" "2f491bb7ca344e2b5c9399d1dbfaf1b22955edab7bd361ff65b4079bae40eb5b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling serde_derive v1.0.113
[INFO] [stderr]    Compiling serde v1.0.113
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling const-concat v0.1.1 (https://github.com/reesmanp/const-concat#1d2339c1)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/const-concat-fde51134b3861d5b/1d2339c/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     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[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/const-concat-fde51134b3861d5b/1d2339c/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     const_fn,
[INFO] [stdout] 3 | |     const_fn_union,
[INFO] [stdout] 4 | |     untagged_unions,
[INFO] [stdout] 5 | |     const_raw_ptr_deref
[INFO] [stdout] 6 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-concat` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2f491bb7ca344e2b5c9399d1dbfaf1b22955edab7bd361ff65b4079bae40eb5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f491bb7ca344e2b5c9399d1dbfaf1b22955edab7bd361ff65b4079bae40eb5b", kill_on_drop: false }`
[INFO] [stdout] 2f491bb7ca344e2b5c9399d1dbfaf1b22955edab7bd361ff65b4079bae40eb5b