[INFO] fetching crate valid_rust_char 0.1.0...
[INFO] checking valid_rust_char-0.1.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate valid_rust_char 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate valid_rust_char 0.1.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] a24995f96073acbd204b656101dd9d326b8e401c8a50e4e638adec1646a20837
[INFO] running `Command { std: "docker" "start" "-a" "a24995f96073acbd204b656101dd9d326b8e401c8a50e4e638adec1646a20837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a24995f96073acbd204b656101dd9d326b8e401c8a50e4e638adec1646a20837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a24995f96073acbd204b656101dd9d326b8e401c8a50e4e638adec1646a20837", kill_on_drop: false }`
[INFO] [stdout] a24995f96073acbd204b656101dd9d326b8e401c8a50e4e638adec1646a20837
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a9c3940fa331d2ccd7947f10faf4508da2c139b9dd6f8b0e1f0f4470f830afd
[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" "8a9c3940fa331d2ccd7947f10faf4508da2c139b9dd6f8b0e1f0f4470f830afd", 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-a32d8c6b930e07bc/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Os { code: 30, kind: Other, message: "Read-only file system" }
[INFO] running `Command { std: "docker" "inspect" "8a9c3940fa331d2ccd7947f10faf4508da2c139b9dd6f8b0e1f0f4470f830afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a9c3940fa331d2ccd7947f10faf4508da2c139b9dd6f8b0e1f0f4470f830afd", kill_on_drop: false }`
[INFO] [stdout] 8a9c3940fa331d2ccd7947f10faf4508da2c139b9dd6f8b0e1f0f4470f830afd