[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] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88e9f0d2ae20e0e0cc736831ee95241dacf97e82
[INFO] testing sombrastudios/substr against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsombrastudios%2Fsubstr" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sombrastudios/substr on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-12/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" "+722e1797249a965b6335aebd65d777f917e498f1" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe04e9f9739cd2584600dcd5d5b49a90c87cdd300531cd8fee4f0a1faf1b62bf
[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" "fe04e9f9739cd2584600dcd5d5b49a90c87cdd300531cd8fee4f0a1faf1b62bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe04e9f9739cd2584600dcd5d5b49a90c87cdd300531cd8fee4f0a1faf1b62bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe04e9f9739cd2584600dcd5d5b49a90c87cdd300531cd8fee4f0a1faf1b62bf", kill_on_drop: false }`
[INFO] [stdout] fe04e9f9739cd2584600dcd5d5b49a90c87cdd300531cd8fee4f0a1faf1b62bf
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31a4e7b9836ff1ad9ecf49a4686ac4c48142adc01cb2a6dcb2b52d66240c1304
[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" "31a4e7b9836ff1ad9ecf49a4686ac4c48142adc01cb2a6dcb2b52d66240c1304", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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] 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] running `Command { std: "docker" "inspect" "31a4e7b9836ff1ad9ecf49a4686ac4c48142adc01cb2a6dcb2b52d66240c1304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31a4e7b9836ff1ad9ecf49a4686ac4c48142adc01cb2a6dcb2b52d66240c1304", kill_on_drop: false }`
[INFO] [stdout] 31a4e7b9836ff1ad9ecf49a4686ac4c48142adc01cb2a6dcb2b52d66240c1304