[INFO] cloning repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sombrastudios/substr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Fsubstr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Fsubstr'...
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] updating cached repository https://github.com/sombrastudios/substr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88e9f0d2ae20e0e0cc736831ee95241dacf97e82
[INFO] checking sombrastudios/substr against master#1673f1450eeaf4a5452e086db0fe2ae274a0144f for pr-99413
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Fsubstr" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sombrastudios/substr on toolchain 1673f1450eeaf4a5452e086db0fe2ae274a0144f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1673f1450eeaf4a5452e086db0fe2ae274a0144f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sombrastudios/substr
[INFO] finished tweaking git repo https://github.com/sombrastudios/substr
[INFO] tweaked toml for git repo https://github.com/sombrastudios/substr written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/sombrastudios/substr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1673f1450eeaf4a5452e086db0fe2ae274a0144f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+1673f1450eeaf4a5452e086db0fe2ae274a0144f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51f11c5ca12f6c12db78b2280db39c4b37ece2b8b6986ed4fe58fc92f77271cf
[INFO] running `Command { std: "docker" "start" "-a" "51f11c5ca12f6c12db78b2280db39c4b37ece2b8b6986ed4fe58fc92f77271cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51f11c5ca12f6c12db78b2280db39c4b37ece2b8b6986ed4fe58fc92f77271cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51f11c5ca12f6c12db78b2280db39c4b37ece2b8b6986ed4fe58fc92f77271cf", kill_on_drop: false }`
[INFO] [stdout] 51f11c5ca12f6c12db78b2280db39c4b37ece2b8b6986ed4fe58fc92f77271cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "RUSTDOCFLAGS=--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:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+1673f1450eeaf4a5452e086db0fe2ae274a0144f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 708c2bac874a45aae46446cc50112cc0637147eb61ba93fd60b55c39f22b0f50
[INFO] running `Command { std: "docker" "start" "-a" "708c2bac874a45aae46446cc50112cc0637147eb61ba93fd60b55c39f22b0f50", kill_on_drop: false }`
[INFO] [stderr]     Checking substr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `.`, `?`, `]`, or an operator, found `,`
[INFO] [stdout]   --> src/main.rs:33:18
[INFO] [stdout]    |
[INFO] [stdout] 32 |             ["-s", index, rest..] => self.with_start(index.parse().expect("expect number after -s flag")).from_args(rest)
[INFO] [stdout]    |                                   -- while parsing the `match` arm starting here
[INFO] [stdout] 33 |             ["-e", index, rest..] => self.with_end(index.parse().expect("expect number after -e flag")).from_args(rest)
[INFO] [stdout]    |                  ^ expected one of `.`, `?`, `]`, or an operator
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `.`, `?`, `]`, or an operator, found `,`
[INFO] [stdout]   --> src/main.rs:33:18
[INFO] [stdout]    |
[INFO] [stdout] 32 |             ["-s", index, rest..] => self.with_start(index.parse().expect("expect number after -s flag")).from_args(rest)
[INFO] [stdout]    |                                   -- while parsing the `match` arm starting here
[INFO] [stdout] 33 |             ["-e", index, rest..] => self.with_end(index.parse().expect("expect number after -e flag")).from_args(rest)
[INFO] [stdout]    |                  ^ expected one of `.`, `?`, `]`, or an operator
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         #![feature(slice_patterns, advanced_slice_patterns)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         #![feature(slice_patterns, advanced_slice_patterns)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `substr` due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `substr` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "708c2bac874a45aae46446cc50112cc0637147eb61ba93fd60b55c39f22b0f50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "708c2bac874a45aae46446cc50112cc0637147eb61ba93fd60b55c39f22b0f50", kill_on_drop: false }`
[INFO] [stdout] 708c2bac874a45aae46446cc50112cc0637147eb61ba93fd60b55c39f22b0f50