[INFO] cloning repository https://github.com/wasm-data-structures/red-black-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wasm-data-structures/red-black-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwasm-data-structures%2Fred-black-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwasm-data-structures%2Fred-black-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed83cf69671e10961ccb1024a54db16cc946b42d
[INFO] testing wasm-data-structures/red-black-tree against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwasm-data-structures%2Fred-black-tree" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wasm-data-structures/red-black-tree on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wasm-data-structures/red-black-tree
[INFO] finished tweaking git repo https://github.com/wasm-data-structures/red-black-tree
[INFO] tweaked toml for git repo https://github.com/wasm-data-structures/red-black-tree written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/wasm-data-structures/red-black-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47e406f01a4654a14654d581776caf82e3a4de4b9cf3ec37b7e32e41875d7f01
[INFO] running `Command { std: "docker" "start" "-a" "47e406f01a4654a14654d581776caf82e3a4de4b9cf3ec37b7e32e41875d7f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47e406f01a4654a14654d581776caf82e3a4de4b9cf3ec37b7e32e41875d7f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47e406f01a4654a14654d581776caf82e3a4de4b9cf3ec37b7e32e41875d7f01", kill_on_drop: false }`
[INFO] [stdout] 47e406f01a4654a14654d581776caf82e3a4de4b9cf3ec37b7e32e41875d7f01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] badf3740be790b76d209c71b98c345bfb7ea957add336b3f32397bf8ba4d62b6
[INFO] running `Command { std: "docker" "start" "-a" "badf3740be790b76d209c71b98c345bfb7ea957add336b3f32397bf8ba4d62b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling red-black-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0522]: definition of an unknown language item: `panic_fmt`
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[lang = "panic_fmt"] fn panic_fmt() -> ! { loop {} }
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `panic_fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `red-black-tree`
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about this error, try `rustc --explain E0522`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "badf3740be790b76d209c71b98c345bfb7ea957add336b3f32397bf8ba4d62b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "badf3740be790b76d209c71b98c345bfb7ea957add336b3f32397bf8ba4d62b6", kill_on_drop: false }`
[INFO] [stdout] badf3740be790b76d209c71b98c345bfb7ea957add336b3f32397bf8ba4d62b6