[INFO] cloning repository https://github.com/desource/alexandria.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/desource/alexandria.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f1386486eaed21df78b2678cb1fbabc1646abfc
[INFO] checking desource/alexandria.rs against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesource%2Falexandria.rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/desource/alexandria.rs on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/desource/alexandria.rs
[INFO] finished tweaking git repo https://github.com/desource/alexandria.rs
[INFO] tweaked toml for git repo https://github.com/desource/alexandria.rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/desource/alexandria.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdd6a2bc70a20652f9a7a92e3fe11e31a02199b6052ede7662f34a9ecbae8920
[INFO] running `Command { std: "docker" "start" "-a" "fdd6a2bc70a20652f9a7a92e3fe11e31a02199b6052ede7662f34a9ecbae8920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdd6a2bc70a20652f9a7a92e3fe11e31a02199b6052ede7662f34a9ecbae8920", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdd6a2bc70a20652f9a7a92e3fe11e31a02199b6052ede7662f34a9ecbae8920", kill_on_drop: false }`
[INFO] [stdout] fdd6a2bc70a20652f9a7a92e3fe11e31a02199b6052ede7662f34a9ecbae8920
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7eb921b4909e1e361b66f5fab739dc47f5a6258dc9b7b8939ea02550c17e132
[INFO] running `Command { std: "docker" "start" "-a" "a7eb921b4909e1e361b66f5fab739dc47f5a6258dc9b7b8939ea02550c17e132", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring v0.2.3
[INFO] [stderr]     Checking untrusted v0.3.1
[INFO] [stderr]     Checking lazy_static v0.2.1
[INFO] [stderr]     Checking libc v0.2.15
[INFO] [stdout] error[E0277]: `&&Vec<String>` is not an iterator
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ring-0.2.3/build.rs:207:19
[INFO] [stdout]     |
[INFO] [stdout] 207 |             .args(&args)
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   `&&Vec<String>` is not an iterator
[INFO] [stdout]     |                   help: consider adding dereference here: `&*args`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Iterator` is not implemented for `&&Vec<String>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `IntoIterator` for `&&Vec<String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ring` due to 2 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a7eb921b4909e1e361b66f5fab739dc47f5a6258dc9b7b8939ea02550c17e132", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7eb921b4909e1e361b66f5fab739dc47f5a6258dc9b7b8939ea02550c17e132", kill_on_drop: false }`
[INFO] [stdout] a7eb921b4909e1e361b66f5fab739dc47f5a6258dc9b7b8939ea02550c17e132