[INFO] cloning repository https://github.com/marcusklaas/lisp-interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcusklaas/lisp-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusklaas%2Flisp-interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusklaas%2Flisp-interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec95166813fa1e6a301e92a1787e356d78431b98
[INFO] testing marcusklaas/lisp-interpreter against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusklaas%2Flisp-interpreter" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marcusklaas/lisp-interpreter 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/marcusklaas/lisp-interpreter
[INFO] finished tweaking git repo https://github.com/marcusklaas/lisp-interpreter
[INFO] tweaked toml for git repo https://github.com/marcusklaas/lisp-interpreter written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/marcusklaas/lisp-interpreter 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] d93e5c23d646e1d89a16492cb4b8276d7056916561f162b5e0cbfeea01868607
[INFO] running `Command { std: "docker" "start" "-a" "d93e5c23d646e1d89a16492cb4b8276d7056916561f162b5e0cbfeea01868607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d93e5c23d646e1d89a16492cb4b8276d7056916561f162b5e0cbfeea01868607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d93e5c23d646e1d89a16492cb4b8276d7056916561f162b5e0cbfeea01868607", kill_on_drop: false }`
[INFO] [stdout] d93e5c23d646e1d89a16492cb4b8276d7056916561f162b5e0cbfeea01868607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 2636ffd1d0476ad296f557e8c4e4031ea5f1a7cf3b603703404da0b7f43f0892
[INFO] running `Command { std: "docker" "start" "-a" "2636ffd1d0476ad296f557e8c4e4031ea5f1a7cf3b603703404da0b7f43f0892", kill_on_drop: false }`
[INFO] [stderr]    Compiling string-interner v0.6.2
[INFO] [stderr]    Compiling yalp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.32s
[INFO] running `Command { std: "docker" "inspect" "2636ffd1d0476ad296f557e8c4e4031ea5f1a7cf3b603703404da0b7f43f0892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2636ffd1d0476ad296f557e8c4e4031ea5f1a7cf3b603703404da0b7f43f0892", kill_on_drop: false }`
[INFO] [stdout] 2636ffd1d0476ad296f557e8c4e4031ea5f1a7cf3b603703404da0b7f43f0892
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c4939ecbf832a28f158cd4a8cde905b0b2c9085145bc083bc00bb692bef2e3a
[INFO] running `Command { std: "docker" "start" "-a" "6c4939ecbf832a28f158cd4a8cde905b0b2c9085145bc083bc00bb692bef2e3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling thread_local v1.1.2
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling rand_core v0.6.1
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling quickcheck v1.0.3
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stderr]    Compiling yalp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                   ^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yalp` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6c4939ecbf832a28f158cd4a8cde905b0b2c9085145bc083bc00bb692bef2e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c4939ecbf832a28f158cd4a8cde905b0b2c9085145bc083bc00bb692bef2e3a", kill_on_drop: false }`
[INFO] [stdout] 6c4939ecbf832a28f158cd4a8cde905b0b2c9085145bc083bc00bb692bef2e3a