[INFO] cloning repository https://github.com/substrate-system/bab-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/substrate-system/bab-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsubstrate-system%2Fbab-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsubstrate-system%2Fbab-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c54ebcedc9ff937f313893e636ce7ee6ded5a3b
[INFO] checking substrate-system/bab-rs against try#3857be5045fe74bd0f296f6f4c23db10f8857f73 for pr-156807
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsubstrate-system%2Fbab-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/substrate-system/bab-rs
[INFO] finished tweaking git repo https://github.com/substrate-system/bab-rs
[INFO] tweaked toml for git repo https://github.com/substrate-system/bab-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/substrate-system/bab-rs on toolchain 3857be5045fe74bd0f296f6f4c23db10f8857f73
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/substrate-system/bab-rs 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" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.104
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.104
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.104
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.104
[INFO] [stderr]   Downloaded anyhash-macros v0.1.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.104
[INFO] [stderr]   Downloaded anyhash v0.1.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.102
[INFO] [stderr]   Downloaded order_theory v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e99388f84cf49c4cea26e1c2085e359044352a8f2ebdfee316e2b59cd120a53e
[INFO] running `Command { std: "docker" "start" "-a" "e99388f84cf49c4cea26e1c2085e359044352a8f2ebdfee316e2b59cd120a53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e99388f84cf49c4cea26e1c2085e359044352a8f2ebdfee316e2b59cd120a53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99388f84cf49c4cea26e1c2085e359044352a8f2ebdfee316e2b59cd120a53e", kill_on_drop: false }`
[INFO] [stdout] e99388f84cf49c4cea26e1c2085e359044352a8f2ebdfee316e2b59cd120a53e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8648ab2caab1a65e62272ba2912311935db1330b8efc3f7292a2d72c7b3b05e
[INFO] running `Command { std: "docker" "start" "-a" "b8648ab2caab1a65e62272ba2912311935db1330b8efc3f7292a2d72c7b3b05e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.102
[INFO] [stderr]    Compiling unicode-ident v1.0.20
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]     Checking order_theory v0.1.2
[INFO] [stderr]     Checking zeroize v1.8.2
[INFO] [stderr]     Checking constant_time_eq v0.4.2
[INFO] [stderr]     Checking arrayref v0.3.9
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling anyhash-macros v0.1.0
[INFO] [stderr]     Checking anyhash v0.1.3
[INFO] [stderr]     Checking bab v0.4.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bab` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b8648ab2caab1a65e62272ba2912311935db1330b8efc3f7292a2d72c7b3b05e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8648ab2caab1a65e62272ba2912311935db1330b8efc3f7292a2d72c7b3b05e", kill_on_drop: false }`
[INFO] [stdout] b8648ab2caab1a65e62272ba2912311935db1330b8efc3f7292a2d72c7b3b05e