[INFO] cloning repository https://github.com/PhilippGackstatter/ion
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PhilippGackstatter/ion" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Fion", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Fion'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e82d4604b9a07641374651be9652d4dd3c83baf6
[INFO] checking PhilippGackstatter/ion against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPhilippGackstatter%2Fion" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PhilippGackstatter/ion on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PhilippGackstatter/ion
[INFO] finished tweaking git repo https://github.com/PhilippGackstatter/ion
[INFO] tweaked toml for git repo https://github.com/PhilippGackstatter/ion written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PhilippGackstatter/ion already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argparse v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d110896c630982cebb472a93ebed3266090c940813e67b73fb6e404962eb72e0
[INFO] running `Command { std: "docker" "start" "-a" "d110896c630982cebb472a93ebed3266090c940813e67b73fb6e404962eb72e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d110896c630982cebb472a93ebed3266090c940813e67b73fb6e404962eb72e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d110896c630982cebb472a93ebed3266090c940813e67b73fb6e404962eb72e0", kill_on_drop: false }`
[INFO] [stdout] d110896c630982cebb472a93ebed3266090c940813e67b73fb6e404962eb72e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71808aa5439489cf229b4d36246a58000c54d2e19a0244952ed76c2795a7b108
[INFO] running `Command { std: "docker" "start" "-a" "71808aa5439489cf229b4d36246a58000c54d2e19a0244952ed76c2795a7b108", kill_on_drop: false }`
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking ion v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/compiler.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 107 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `methods`
[INFO] [stdout]    --> src/compiler.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 methods,
[INFO] [stdout]     |                 ^^^^^^^ help: try ignoring the field: `methods: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/compiler.rs:114:17
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/compiler.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 107 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `methods`
[INFO] [stdout]    --> src/compiler.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 methods,
[INFO] [stdout]     |                 ^^^^^^^ help: try ignoring the field: `methods: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/compiler.rs:114:17
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/type_checker.rs:497:17
[INFO] [stdout]     |
[INFO] [stdout] 497 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `methods`
[INFO] [stdout]    --> src/type_checker.rs:498:17
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 methods,
[INFO] [stdout]     |                 ^^^^^^^ help: try ignoring the field: `methods: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/type_checker.rs:507:17
[INFO] [stdout]     |
[INFO] [stdout] 507 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/type_checker.rs:497:17
[INFO] [stdout]     |
[INFO] [stdout] 497 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `methods`
[INFO] [stdout]    --> src/type_checker.rs:498:17
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 methods,
[INFO] [stdout]     |                 ^^^^^^^ help: try ignoring the field: `methods: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trait_name`
[INFO] [stdout]    --> src/type_checker.rs:507:17
[INFO] [stdout]     |
[INFO] [stdout] 507 |                 trait_name,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: try ignoring the field: `trait_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "71808aa5439489cf229b4d36246a58000c54d2e19a0244952ed76c2795a7b108", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71808aa5439489cf229b4d36246a58000c54d2e19a0244952ed76c2795a7b108", kill_on_drop: false }`
[INFO] [stdout] 71808aa5439489cf229b4d36246a58000c54d2e19a0244952ed76c2795a7b108