[INFO] fetching crate cstring 0.1.1...
[INFO] checking cstring-0.1.1 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate cstring 0.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate cstring 0.1.1 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cstring 0.1.1
[INFO] finished tweaking crates.io crate cstring 0.1.1
[INFO] tweaked toml for crates.io crate cstring 0.1.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "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] b5a8f7c9cdca16de76f186f4e7fda5a40fb9b029d706cac2c2c1bd759689e572
[INFO] running `Command { std: "docker" "start" "-a" "b5a8f7c9cdca16de76f186f4e7fda5a40fb9b029d706cac2c2c1bd759689e572", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5a8f7c9cdca16de76f186f4e7fda5a40fb9b029d706cac2c2c1bd759689e572", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5a8f7c9cdca16de76f186f4e7fda5a40fb9b029d706cac2c2c1bd759689e572", kill_on_drop: false }`
[INFO] [stdout] b5a8f7c9cdca16de76f186f4e7fda5a40fb9b029d706cac2c2c1bd759689e572
[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" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "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] a6913fa3465635ae655df93d909487fe3b82482c2aacf72a10609e748cdd1bb2
[INFO] running `Command { std: "docker" "start" "-a" "a6913fa3465635ae655df93d909487fe3b82482c2aacf72a10609e748cdd1bb2", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking cty v0.2.1
[INFO] [stderr]     Checking cstring v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0468]: an `extern crate` loading macros must be at the crate root
[INFO] [stdout]   --> src/cstr_core.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | extern crate std;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0468`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cstring`
[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" "a6913fa3465635ae655df93d909487fe3b82482c2aacf72a10609e748cdd1bb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6913fa3465635ae655df93d909487fe3b82482c2aacf72a10609e748cdd1bb2", kill_on_drop: false }`
[INFO] [stdout] a6913fa3465635ae655df93d909487fe3b82482c2aacf72a10609e748cdd1bb2