[INFO] cloning repository https://github.com/matklad/compilers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matklad/compilers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72d3c92c8f726c582ddf6ef8ce677559ec320035
[INFO] checking matklad/compilers against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fcompilers" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matklad/compilers on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matklad/compilers
[INFO] finished tweaking git repo https://github.com/matklad/compilers
[INFO] tweaked toml for git repo https://github.com/matklad/compilers written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/matklad/compilers 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d6b4cbffe31f69574dd97c4620342345e6a252819bc5486883296cd0d3338f3
[INFO] running `Command { std: "docker" "start" "-a" "8d6b4cbffe31f69574dd97c4620342345e6a252819bc5486883296cd0d3338f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d6b4cbffe31f69574dd97c4620342345e6a252819bc5486883296cd0d3338f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d6b4cbffe31f69574dd97c4620342345e6a252819bc5486883296cd0d3338f3", kill_on_drop: false }`
[INFO] [stdout] 8d6b4cbffe31f69574dd97c4620342345e6a252819bc5486883296cd0d3338f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51b001249f6f9c2457eac00e3b6b8b0a42c4ddd27c1098932c15f89199791577
[INFO] running `Command { std: "docker" "start" "-a" "51b001249f6f9c2457eac00e3b6b8b0a42c4ddd27c1098932c15f89199791577", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures v0.1.0 (/opt/rustwide/workdir/data_structures)
[INFO] [stderr]    Compiling runtime v0.1.0 (/opt/rustwide/workdir/pyt/runtime)
[INFO] [stderr]     Checking syntax v0.1.0 (/opt/rustwide/workdir/syntax)
[INFO] [stderr]     Checking frontend v0.1.0 (/opt/rustwide/workdir/pyt/frontend)
[INFO] [stderr]     Checking super_tiny_compiler v0.1.0 (/opt/rustwide/workdir/super_tiny_compiler)
[INFO] [stderr]     Checking pyt v0.1.0 (/opt/rustwide/workdir/pyt)
[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] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runtime` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "51b001249f6f9c2457eac00e3b6b8b0a42c4ddd27c1098932c15f89199791577", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b001249f6f9c2457eac00e3b6b8b0a42c4ddd27c1098932c15f89199791577", kill_on_drop: false }`
[INFO] [stdout] 51b001249f6f9c2457eac00e3b6b8b0a42c4ddd27c1098932c15f89199791577