[INFO] cloning repository https://github.com/cronokirby/ovis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cronokirby/ovis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fovis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fovis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f261c175753b6589aecfc70b142bd8ab20c914d4
[INFO] checking cronokirby/ovis against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fovis" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cronokirby/ovis on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cronokirby/ovis
[INFO] finished tweaking git repo https://github.com/cronokirby/ovis
[INFO] tweaked toml for git repo https://github.com/cronokirby/ovis written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/cronokirby/ovis already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded peg-runtime v0.6.3
[INFO] [stderr]   Downloaded peg-macros v0.6.3
[INFO] [stderr]   Downloaded peg v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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] 2a0db9dca83a6814d9bcb4e61c6f542f12ec62c529bbbfda218140ab59e8956c
[INFO] running `Command { std: "docker" "start" "-a" "2a0db9dca83a6814d9bcb4e61c6f542f12ec62c529bbbfda218140ab59e8956c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a0db9dca83a6814d9bcb4e61c6f542f12ec62c529bbbfda218140ab59e8956c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a0db9dca83a6814d9bcb4e61c6f542f12ec62c529bbbfda218140ab59e8956c", kill_on_drop: false }`
[INFO] [stdout] 2a0db9dca83a6814d9bcb4e61c6f542f12ec62c529bbbfda218140ab59e8956c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31b6f7d6b4d741c12ac7900d4cf9addbeb01d72bd1a8cb5270acc81fa326455a
[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" "31b6f7d6b4d741c12ac7900d4cf9addbeb01d72bd1a8cb5270acc81fa326455a", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]     Checking ovis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `builtins`
[INFO] [stdout]    --> src/main.rs:131:28
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let (simplified, dict, builtins) = simplifier::simplify(ast, &mut source);
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builtins`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/stg.rs:305:17
[INFO] [stdout]     |
[INFO] [stdout] 305 |             let name = source.next();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `builtins`
[INFO] [stdout]    --> src/main.rs:131:28
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let (simplified, dict, builtins) = simplifier::simplify(ast, &mut source);
[INFO] [stdout]     |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_builtins`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/stg.rs:305:17
[INFO] [stdout]     |
[INFO] [stdout] 305 |             let name = source.next();
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index`
[INFO] [stdout]    --> src/simplifier.rs:326:8
[INFO] [stdout]     |
[INFO] [stdout] 326 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ident`
[INFO] [stdout]    --> src/simplifier.rs:350:12
[INFO] [stdout]     |
[INFO] [stdout] 350 |     pub fn ident(&self, builtin: Builtin) -> Ident {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `No`
[INFO] [stdout]   --> src/stg.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     No,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `index`
[INFO] [stdout]    --> src/simplifier.rs:326:8
[INFO] [stdout]     |
[INFO] [stdout] 326 |     fn index(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ident`
[INFO] [stdout]    --> src/simplifier.rs:350:12
[INFO] [stdout]     |
[INFO] [stdout] 350 |     pub fn ident(&self, builtin: Builtin) -> Ident {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `No`
[INFO] [stdout]   --> src/stg.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     No,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.43s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "31b6f7d6b4d741c12ac7900d4cf9addbeb01d72bd1a8cb5270acc81fa326455a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31b6f7d6b4d741c12ac7900d4cf9addbeb01d72bd1a8cb5270acc81fa326455a", kill_on_drop: false }`
[INFO] [stdout] 31b6f7d6b4d741c12ac7900d4cf9addbeb01d72bd1a8cb5270acc81fa326455a