[INFO] fetching crate cargo-fuzzcheck 0.13.0...
[INFO] checking cargo-fuzzcheck-0.13.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cargo-fuzzcheck 0.13.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate cargo-fuzzcheck 0.13.0
[INFO] finished tweaking crates.io crate cargo-fuzzcheck 0.13.0
[INFO] tweaked toml for crates.io crate cargo-fuzzcheck 0.13.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-fuzzcheck 0.13.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cargo-fuzzcheck 0.13.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2ba4cff505d9ce8b07406f7de68486e8ee2fa8d053a223a04c0348038f2c8f6
[INFO] running `Command { std: "docker" "start" "-a" "e2ba4cff505d9ce8b07406f7de68486e8ee2fa8d053a223a04c0348038f2c8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2ba4cff505d9ce8b07406f7de68486e8ee2fa8d053a223a04c0348038f2c8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2ba4cff505d9ce8b07406f7de68486e8ee2fa8d053a223a04c0348038f2c8f6", kill_on_drop: false }`
[INFO] [stdout] e2ba4cff505d9ce8b07406f7de68486e8ee2fa8d053a223a04c0348038f2c8f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b546dcd9eefe7cf85b7efe0cef0dd87a6718c67fd2d72eb5756962529623e316
[INFO] running `Command { std: "docker" "start" "-a" "b546dcd9eefe7cf85b7efe0cef0dd87a6718c67fd2d72eb5756962529623e316", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]    Compiling cargo-fuzzcheck v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking fuzzcheck_common v0.13.0
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Option<String>>
[INFO] [stdout]   --> src/main.rs:70:38
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let cargo_args: Option<String> = matches.opt_get(CARGO_ARGS_FLAG)?;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:70:38
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let cargo_args: Option<String> = matches.opt_get(CARGO_ARGS_FLAG)?;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:92:25
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let test_name = matches.opt_get::<String>("test").unwrap().unwrap();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let bin_name = matches.opt_get::<String>("bin").unwrap().unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Option<String>>
[INFO] [stdout]   --> src/main.rs:70:38
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let cargo_args: Option<String> = matches.opt_get(CARGO_ARGS_FLAG)?;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:70:38
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let cargo_args: Option<String> = matches.opt_get(CARGO_ARGS_FLAG)?;
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:92:25
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let test_name = matches.opt_get::<String>("test").unwrap().unwrap();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> src/main.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let bin_name = matches.opt_get::<String>("bin").unwrap().unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-fuzzcheck` (bin "cargo-fuzzcheck") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `cargo-fuzzcheck` (bin "cargo-fuzzcheck" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "b546dcd9eefe7cf85b7efe0cef0dd87a6718c67fd2d72eb5756962529623e316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b546dcd9eefe7cf85b7efe0cef0dd87a6718c67fd2d72eb5756962529623e316", kill_on_drop: false }`
[INFO] [stdout] b546dcd9eefe7cf85b7efe0cef0dd87a6718c67fd2d72eb5756962529623e316