[INFO] fetching crate strck 1.0.0...
[INFO] checking strck-1.0.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate strck 1.0.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate strck 1.0.0
[INFO] finished tweaking crates.io crate strck 1.0.0
[INFO] tweaked toml for crates.io crate strck 1.0.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate strck 1.0.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[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] c177710104ef2557789b7e4bb690c6e5fdc165d03b9334a18481a7eee45877b9
[INFO] running `Command { std: "docker" "start" "-a" "c177710104ef2557789b7e4bb690c6e5fdc165d03b9334a18481a7eee45877b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c177710104ef2557789b7e4bb690c6e5fdc165d03b9334a18481a7eee45877b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c177710104ef2557789b7e4bb690c6e5fdc165d03b9334a18481a7eee45877b9", kill_on_drop: false }`
[INFO] [stdout] c177710104ef2557789b7e4bb690c6e5fdc165d03b9334a18481a7eee45877b9
[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] 83558c8cdfcd5db3302169f5a2ede4bacf6cfd44c7dc122c0a3a05414eec73fa
[INFO] running `Command { std: "docker" "start" "-a" "83558c8cdfcd5db3302169f5a2ede4bacf6cfd44c7dc122c0a3a05414eec73fa", kill_on_drop: false }`
[INFO] [stderr]     Checking smol_str v0.3.4
[INFO] [stderr]     Checking strck v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<&Ck<NoInvariant>, Infallible>
[INFO] [stdout]    --> src/lib.rs:489:20
[INFO] [stdout]     |
[INFO] [stdout] 489 |         let this = "this".ck::<NoInvariant>().unwrap();
[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<&Ck<NoInvariant>, Infallible>
[INFO] [stdout]    --> src/lib.rs:497:20
[INFO] [stdout]     |
[INFO] [stdout] 497 |         let this = "this".ck::<NoInvariant>().unwrap();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&Ck<NoInvariant>, Infallible>
[INFO] [stdout]    --> src/lib.rs:498:26
[INFO] [stdout]     |
[INFO] [stdout] 498 |         let still_this = "this".ck::<NoInvariant>().unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&Ck<NoInvariant>, Infallible>
[INFO] [stdout]    --> src/lib.rs:499:21
[INFO] [stdout]     |
[INFO] [stdout] 499 |         let other = "other".ck::<NoInvariant>().unwrap();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Check<NoInvariant, &str>, Infallible>
[INFO] [stdout]    --> src/lib.rs:522:20
[INFO] [stdout]     |
[INFO] [stdout] 522 |         let this = "this".check::<NoInvariant>().unwrap();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Check<NoInvariant, &str>, Infallible>
[INFO] [stdout]    --> src/lib.rs:523:26
[INFO] [stdout]     |
[INFO] [stdout] 523 |         let still_this = "this".check::<NoInvariant>().unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Check<NoInvariant, &str>, Infallible>
[INFO] [stdout]    --> src/lib.rs:524:21
[INFO] [stdout]     |
[INFO] [stdout] 524 |         let other = "other".check::<NoInvariant>().unwrap();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strck` (lib test) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "83558c8cdfcd5db3302169f5a2ede4bacf6cfd44c7dc122c0a3a05414eec73fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83558c8cdfcd5db3302169f5a2ede4bacf6cfd44c7dc122c0a3a05414eec73fa", kill_on_drop: false }`
[INFO] [stdout] 83558c8cdfcd5db3302169f5a2ede4bacf6cfd44c7dc122c0a3a05414eec73fa
