[INFO] fetching crate argust 0.0.3...
[INFO] checking argust-0.0.3 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate argust 0.0.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate argust 0.0.3 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate argust 0.0.3
[INFO] finished tweaking crates.io crate argust 0.0.3
[INFO] tweaked toml for crates.io crate argust 0.0.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4cb4245a2976c3dc7b3b0ea06830695fcfc9e80a99dcd8f306b2245162320bc
[INFO] running `Command { std: "docker" "start" "-a" "a4cb4245a2976c3dc7b3b0ea06830695fcfc9e80a99dcd8f306b2245162320bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4cb4245a2976c3dc7b3b0ea06830695fcfc9e80a99dcd8f306b2245162320bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4cb4245a2976c3dc7b3b0ea06830695fcfc9e80a99dcd8f306b2245162320bc", kill_on_drop: false }`
[INFO] [stdout] a4cb4245a2976c3dc7b3b0ea06830695fcfc9e80a99dcd8f306b2245162320bc
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16713efb5a1f660afe2da6c40745505d3eed2b616ed9e292732ffcdcd336ac72
[INFO] running `Command { std: "docker" "start" "-a" "16713efb5a1f660afe2da6c40745505d3eed2b616ed9e292732ffcdcd336ac72", kill_on_drop: false }`
[INFO] [stderr]     Checking argust v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&OsString` instead of cloning the inner type
[INFO] [stdout]    --> src/parser.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 |         self.clone()
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&OsString` instead of cloning the inner type
[INFO] [stdout]    --> src/parser.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 |         self.clone()
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "16713efb5a1f660afe2da6c40745505d3eed2b616ed9e292732ffcdcd336ac72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16713efb5a1f660afe2da6c40745505d3eed2b616ed9e292732ffcdcd336ac72", kill_on_drop: false }`
[INFO] [stdout] 16713efb5a1f660afe2da6c40745505d3eed2b616ed9e292732ffcdcd336ac72
[INFO] checking argust-0.0.3 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate argust 0.0.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate argust 0.0.3 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate argust 0.0.3
[INFO] finished tweaking crates.io crate argust 0.0.3
[INFO] tweaked toml for crates.io crate argust 0.0.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 786ea7cbe88198273ff4fb861608df687ff74a5422a74f7a37092b6122d10972
[INFO] running `Command { std: "docker" "start" "-a" "786ea7cbe88198273ff4fb861608df687ff74a5422a74f7a37092b6122d10972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "786ea7cbe88198273ff4fb861608df687ff74a5422a74f7a37092b6122d10972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "786ea7cbe88198273ff4fb861608df687ff74a5422a74f7a37092b6122d10972", kill_on_drop: false }`
[INFO] [stdout] 786ea7cbe88198273ff4fb861608df687ff74a5422a74f7a37092b6122d10972
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26670db70c7221cce206251dc5053b413bb02a7144a0153742542876dbece815
[INFO] running `Command { std: "docker" "start" "-a" "26670db70c7221cce206251dc5053b413bb02a7144a0153742542876dbece815", kill_on_drop: false }`
[INFO] [stderr]     Checking argust v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/command.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 | /         match key {
[INFO] [stdout] 79 | |             Some(value) => return (true, value.to_owned()),
[INFO] [stdout] 80 | |             None => return (false, None),
[INFO] [stdout] 81 | |         };
[INFO] [stdout]    | |_________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/command.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 | /         match key {
[INFO] [stdout] 79 | |             Some(value) => return (true, value.to_owned()),
[INFO] [stdout] 80 | |             None => return (false, None),
[INFO] [stdout] 81 | |         };
[INFO] [stdout]    | |_________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argust` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `argust` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "26670db70c7221cce206251dc5053b413bb02a7144a0153742542876dbece815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26670db70c7221cce206251dc5053b413bb02a7144a0153742542876dbece815", kill_on_drop: false }`
[INFO] [stdout] 26670db70c7221cce206251dc5053b413bb02a7144a0153742542876dbece815