[INFO] fetching crate derive-collect-docs 0.1.0...
[INFO] checking derive-collect-docs-0.1.0 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate derive-collect-docs 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate derive-collect-docs 0.1.0 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate derive-collect-docs 0.1.0
[INFO] finished tweaking crates.io crate derive-collect-docs 0.1.0
[INFO] tweaked toml for crates.io crate derive-collect-docs 0.1.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate derive-collect-docs 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 221d0ed4d15f3d0531b5c44398b228ad06a8e7bbb7daeab8d9e83008a1da9b57
[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" "221d0ed4d15f3d0531b5c44398b228ad06a8e7bbb7daeab8d9e83008a1da9b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "221d0ed4d15f3d0531b5c44398b228ad06a8e7bbb7daeab8d9e83008a1da9b57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "221d0ed4d15f3d0531b5c44398b228ad06a8e7bbb7daeab8d9e83008a1da9b57", kill_on_drop: false }`
[INFO] [stdout] 221d0ed4d15f3d0531b5c44398b228ad06a8e7bbb7daeab8d9e83008a1da9b57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14ab284f194e4d1bb16473c71505fb500ff60a125b10d25d057eac12405f3308
[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" "14ab284f194e4d1bb16473c71505fb500ff60a125b10d25d057eac12405f3308", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]     Checking unindent v0.1.5
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking quote v1.0.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking derive-collect-docs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking serde v1.0.105
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> examples/foo.rs:13:37
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug, serde::Deserialize, CollectDocs)]
[INFO] [stdout]    |                                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: could not create directory ./docs/generated: Os { code: 30, kind: Other, message: "Read-only file system" }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive-collect-docs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "14ab284f194e4d1bb16473c71505fb500ff60a125b10d25d057eac12405f3308", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14ab284f194e4d1bb16473c71505fb500ff60a125b10d25d057eac12405f3308", kill_on_drop: false }`
[INFO] [stdout] 14ab284f194e4d1bb16473c71505fb500ff60a125b10d25d057eac12405f3308