[INFO] fetching crate valid_rust_char 0.1.0...
[INFO] checking valid_rust_char-0.1.0 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate valid_rust_char 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate valid_rust_char 0.1.0 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8254d3dbd1e8deb74af47c854317f7bea34bea43a6d8fc4d95371ad57c707387
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8254d3dbd1e8deb74af47c854317f7bea34bea43a6d8fc4d95371ad57c707387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8254d3dbd1e8deb74af47c854317f7bea34bea43a6d8fc4d95371ad57c707387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8254d3dbd1e8deb74af47c854317f7bea34bea43a6d8fc4d95371ad57c707387", kill_on_drop: false }`
[INFO] [stdout] 8254d3dbd1e8deb74af47c854317f7bea34bea43a6d8fc4d95371ad57c707387
[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=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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5473f3c96a6ce103eac257568fb2ac8589aa2cf55ef77dac8f7c4268e4f2644e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5473f3c96a6ce103eac257568fb2ac8589aa2cf55ef77dac8f7c4268e4f2644e", kill_on_drop: false }`
[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-32335e3aa218a0bf/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" "5473f3c96a6ce103eac257568fb2ac8589aa2cf55ef77dac8f7c4268e4f2644e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5473f3c96a6ce103eac257568fb2ac8589aa2cf55ef77dac8f7c4268e4f2644e", kill_on_drop: false }`
[INFO] [stdout] 5473f3c96a6ce103eac257568fb2ac8589aa2cf55ef77dac8f7c4268e4f2644e