[INFO] fetching crate valid_rust_char 0.1.0...
[INFO] checking valid_rust_char-0.1.0 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate valid_rust_char 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate valid_rust_char 0.1.0 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate valid_rust_char 0.1.0
[INFO] finished tweaking crates.io crate valid_rust_char 0.1.0
[INFO] tweaked toml for crates.io crate valid_rust_char 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f648ebc404d3523c0ba7d28f3cefff5ccf20b5857fb280c8e585b036ba2df49f
[INFO] running `Command { std: "docker" "start" "-a" "f648ebc404d3523c0ba7d28f3cefff5ccf20b5857fb280c8e585b036ba2df49f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f648ebc404d3523c0ba7d28f3cefff5ccf20b5857fb280c8e585b036ba2df49f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f648ebc404d3523c0ba7d28f3cefff5ccf20b5857fb280c8e585b036ba2df49f", kill_on_drop: false }`
[INFO] [stdout] f648ebc404d3523c0ba7d28f3cefff5ccf20b5857fb280c8e585b036ba2df49f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f0599982a8d18c216d4c8636e837a4a9404640c413f3431c9d20b17e274ef3ee
[INFO] running `Command { std: "docker" "start" "-a" "f0599982a8d18c216d4c8636e837a4a9404640c413f3431c9d20b17e274ef3ee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling valid_rust_char v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `valid_rust_char v0.1.0 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/valid_rust_char-3e1cdd63ace1c311/build-script-build` (exit code: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Os { code: 30, kind: Other, message: "Read-only file system" }
[INFO] running `Command { std: "docker" "inspect" "f0599982a8d18c216d4c8636e837a4a9404640c413f3431c9d20b17e274ef3ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0599982a8d18c216d4c8636e837a4a9404640c413f3431c9d20b17e274ef3ee", kill_on_drop: false }`
[INFO] [stdout] f0599982a8d18c216d4c8636e837a4a9404640c413f3431c9d20b17e274ef3ee