[INFO] fetching crate widestring 0.4.3... [INFO] checking widestring-0.4.3 against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035 [INFO] extracting crate widestring 0.4.3 into /workspace/builds/worker-8/source [INFO] validating manifest of crates.io crate widestring 0.4.3 on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate widestring 0.4.3 [INFO] finished tweaking crates.io crate widestring 0.4.3 [INFO] tweaked toml for crates.io crate widestring 0.4.3 written to /workspace/builds/worker-8/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 77d6a3eeeaa4c4280592097a371d7261b807fd7e419838c4f68f26f76aaa9b4a [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" "77d6a3eeeaa4c4280592097a371d7261b807fd7e419838c4f68f26f76aaa9b4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "77d6a3eeeaa4c4280592097a371d7261b807fd7e419838c4f68f26f76aaa9b4a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "77d6a3eeeaa4c4280592097a371d7261b807fd7e419838c4f68f26f76aaa9b4a", kill_on_drop: false }` [INFO] [stdout] 77d6a3eeeaa4c4280592097a371d7261b807fd7e419838c4f68f26f76aaa9b4a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 520b92353baf624542c41a46df1336f5c6e681babfbf208450da035ee219082e [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" "520b92353baf624542c41a46df1336f5c6e681babfbf208450da035ee219082e", kill_on_drop: false }` [INFO] [stderr] Compiling winapi v0.3.9 [INFO] [stderr] Checking widestring v0.4.3 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:784:13 [INFO] [stdout] | [INFO] [stdout] 784 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:184:5 [INFO] [stdout] | [INFO] [stdout] 184 | unused, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]` [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:826:13 [INFO] [stdout] | [INFO] [stdout] 826 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:848:13 [INFO] [stdout] | [INFO] [stdout] 848 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:868:13 [INFO] [stdout] | [INFO] [stdout] 868 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ustring.rs:402:17 [INFO] [stdout] | [INFO] [stdout] 402 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:784:13 [INFO] [stdout] | [INFO] [stdout] 784 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:184:5 [INFO] [stdout] | [INFO] [stdout] 184 | unused, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] = note: `#[warn(unused_must_use)]` implied by `#[warn(unused)]` [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:826:13 [INFO] [stdout] | [INFO] [stdout] 826 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:848:13 [INFO] [stdout] | [INFO] [stdout] 848 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ucstring.rs:868:13 [INFO] [stdout] | [INFO] [stdout] 868 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `ManuallyDrop::::new` that must be used [INFO] [stdout] --> src/ustring.rs:402:17 [INFO] [stdout] | [INFO] [stdout] 402 | ManuallyDrop::new(chars); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the wrapper, you can use `mem::forget` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.49s [INFO] running `Command { std: "docker" "inspect" "520b92353baf624542c41a46df1336f5c6e681babfbf208450da035ee219082e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "520b92353baf624542c41a46df1336f5c6e681babfbf208450da035ee219082e", kill_on_drop: false }` [INFO] [stdout] 520b92353baf624542c41a46df1336f5c6e681babfbf208450da035ee219082e