[INFO] cloning repository https://github.com/mattmac4241/po-tweet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattmac4241/po-tweet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmac4241%2Fpo-tweet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmac4241%2Fpo-tweet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 217cd5c078fc4a761c64183b5380513aa4e6d69e
[INFO] checking mattmac4241/po-tweet against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattmac4241%2Fpo-tweet" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattmac4241/po-tweet on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mattmac4241/po-tweet
[INFO] finished tweaking git repo https://github.com/mattmac4241/po-tweet
[INFO] tweaked toml for git repo https://github.com/mattmac4241/po-tweet written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/mattmac4241/po-tweet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (rocket_contrib) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bcrypt v0.1.3
[INFO] [stderr]   Downloaded rocket v0.1.5
[INFO] [stderr]   Downloaded jsonwebtoken v1.1.5
[INFO] [stderr]   Downloaded serde v0.8.22
[INFO] [stderr]   Downloaded diesel v0.9.1
[INFO] [stderr]   Downloaded diesel_codegen v0.9.0
[INFO] [stderr]   Downloaded rocket_contrib v0.1.5
[INFO] [stderr]   Downloaded syn v0.10.6
[INFO] [stderr]   Downloaded serde_json v0.8.4
[INFO] [stderr]   Downloaded url v1.3.0
[INFO] [stderr]   Downloaded ring v0.3.1
[INFO] [stderr]   Downloaded diesel_codegen_shared v0.9.0
[INFO] [stderr]   Downloaded serde_derive v0.8.22
[INFO] [stderr]   Downloaded rocket_codegen v0.1.5
[INFO] [stderr]   Downloaded serde_codegen_internals v0.11.3
[INFO] [stderr]   Downloaded serde_codegen v0.8.22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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] 214826a350de281698f36124b0805bb2c47a5696802ee508b914e6b23352dcda
[INFO] running `Command { std: "docker" "start" "-a" "214826a350de281698f36124b0805bb2c47a5696802ee508b914e6b23352dcda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "214826a350de281698f36124b0805bb2c47a5696802ee508b914e6b23352dcda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "214826a350de281698f36124b0805bb2c47a5696802ee508b914e6b23352dcda", kill_on_drop: false }`
[INFO] [stdout] 214826a350de281698f36124b0805bb2c47a5696802ee508b914e6b23352dcda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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] 3592d461de4a627270ac6fa8d281e622acfd6895cfef10c3e5786f99bb9de9e1
[INFO] running `Command { std: "docker" "start" "-a" "3592d461de4a627270ac6fa8d281e622acfd6895cfef10c3e5786f99bb9de9e1", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (rocket_contrib) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr]    Compiling num-traits v0.1.36
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]    Compiling unicode-normalization v0.1.3
[INFO] [stderr]    Compiling quote v0.3.10
[INFO] [stderr]    Compiling serde v0.8.22
[INFO] [stderr]    Compiling gcc v0.3.41
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]    Compiling ring v0.3.1
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stdout] error[E0277]: `&&Vec<String>` is not an iterator
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ring-0.3.1/build.rs:206:19
[INFO] [stdout]     |
[INFO] [stdout] 206 |             .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] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ring`
[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" "3592d461de4a627270ac6fa8d281e622acfd6895cfef10c3e5786f99bb9de9e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3592d461de4a627270ac6fa8d281e622acfd6895cfef10c3e5786f99bb9de9e1", kill_on_drop: false }`
[INFO] [stdout] 3592d461de4a627270ac6fa8d281e622acfd6895cfef10c3e5786f99bb9de9e1