[INFO] fetching crate valid_rust_char 0.1.0...
[INFO] checking valid_rust_char-0.1.0 against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] extracting crate valid_rust_char 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate valid_rust_char 0.1.0 on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "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] 0be3d0c2bc790264e1bc15dc79126eced09ac889a85e8bd8ce8709e1b329798f
[INFO] running `Command { std: "docker" "start" "-a" "0be3d0c2bc790264e1bc15dc79126eced09ac889a85e8bd8ce8709e1b329798f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0be3d0c2bc790264e1bc15dc79126eced09ac889a85e8bd8ce8709e1b329798f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0be3d0c2bc790264e1bc15dc79126eced09ac889a85e8bd8ce8709e1b329798f", kill_on_drop: false }`
[INFO] [stdout] 0be3d0c2bc790264e1bc15dc79126eced09ac889a85e8bd8ce8709e1b329798f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "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] 93de71780ec246b238525dee99f474c5b68261595b181bd93e9132366ef6a23b
[INFO] running `Command { std: "docker" "start" "-a" "93de71780ec246b238525dee99f474c5b68261595b181bd93e9132366ef6a23b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[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-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" "93de71780ec246b238525dee99f474c5b68261595b181bd93e9132366ef6a23b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93de71780ec246b238525dee99f474c5b68261595b181bd93e9132366ef6a23b", kill_on_drop: false }`
[INFO] [stdout] 93de71780ec246b238525dee99f474c5b68261595b181bd93e9132366ef6a23b