[INFO] fetching crate macro_rules_attribute-proc_macro 0.2.0... [INFO] checking macro_rules_attribute-proc_macro-0.2.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate macro_rules_attribute-proc_macro 0.2.0 into /workspace/builds/worker-3-tc2/source [INFO] validating manifest of crates.io crate macro_rules_attribute-proc_macro 0.2.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate macro_rules_attribute-proc_macro 0.2.0 [INFO] finished tweaking crates.io crate macro_rules_attribute-proc_macro 0.2.0 [INFO] tweaked toml for crates.io crate macro_rules_attribute-proc_macro 0.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f9b9056ff8565ff0800eed1ce159689111584af31d144a2aa5240a2c5dfbf6a0 [INFO] running `Command { std: "docker" "start" "-a" "f9b9056ff8565ff0800eed1ce159689111584af31d144a2aa5240a2c5dfbf6a0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f9b9056ff8565ff0800eed1ce159689111584af31d144a2aa5240a2c5dfbf6a0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f9b9056ff8565ff0800eed1ce159689111584af31d144a2aa5240a2c5dfbf6a0", kill_on_drop: false }` [INFO] [stdout] f9b9056ff8565ff0800eed1ce159689111584af31d144a2aa5240a2c5dfbf6a0 [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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 812003970e885b8f449055e2a3d8b70f6bde1fee105f2a8ddd86947e3fc4fab7 [INFO] running `Command { std: "docker" "start" "-a" "812003970e885b8f449055e2a3d8b70f6bde1fee105f2a8ddd86947e3fc4fab7", kill_on_drop: false }` [INFO] [stderr] Checking macro_rules_attribute-proc_macro v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:223:17 [INFO] [stdout] | [INFO] [stdout] 223 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 251 | parse_optional_semicolons!(); [INFO] [stdout] | ---------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_copy_types)]` on by default [INFO] [stdout] = note: this warning originates in the macro `parse_optional_semicolons` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 223 - drop(tts.next()); [INFO] [stdout] 223 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:244:13 [INFO] [stdout] | [INFO] [stdout] 244 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 260 | parse_trailing_comma!(); [INFO] [stdout] | ----------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_trailing_comma` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 244 - drop(tts.next()); [INFO] [stdout] 244 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:266:13 [INFO] [stdout] | [INFO] [stdout] 266 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 266 - drop(tts.next()); [INFO] [stdout] 266 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:244:13 [INFO] [stdout] | [INFO] [stdout] 244 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 268 | parse_trailing_comma!(); [INFO] [stdout] | ----------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_trailing_comma` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 244 - drop(tts.next()); [INFO] [stdout] 244 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:223:17 [INFO] [stdout] | [INFO] [stdout] 223 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 276 | if parse_optional_semicolons!().is_none() { [INFO] [stdout] | ---------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_optional_semicolons` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 223 - drop(tts.next()); [INFO] [stdout] 223 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> mod.rs:300:9 [INFO] [stdout] | [INFO] [stdout] 297 | / fn vec (self: Self) [INFO] [stdout] 298 | | -> Vec [INFO] [stdout] | |________________________- move the `impl` block outside of this method `vec` [INFO] [stdout] 299 | { [INFO] [stdout] 300 | impl CollectVec for T {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^----------^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `CollectVec` is not local [INFO] [stdout] | [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue [INFO] [stdout] = note: `#[warn(non_local_definitions)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:223:17 [INFO] [stdout] | [INFO] [stdout] 223 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 251 | parse_optional_semicolons!(); [INFO] [stdout] | ---------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_copy_types)]` on by default [INFO] [stdout] = note: this warning originates in the macro `parse_optional_semicolons` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 223 - drop(tts.next()); [INFO] [stdout] 223 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:244:13 [INFO] [stdout] | [INFO] [stdout] 244 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 260 | parse_trailing_comma!(); [INFO] [stdout] | ----------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_trailing_comma` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 244 - drop(tts.next()); [INFO] [stdout] 244 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:266:13 [INFO] [stdout] | [INFO] [stdout] 266 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 266 - drop(tts.next()); [INFO] [stdout] 266 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:244:13 [INFO] [stdout] | [INFO] [stdout] 244 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 268 | parse_trailing_comma!(); [INFO] [stdout] | ----------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_trailing_comma` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 244 - drop(tts.next()); [INFO] [stdout] 244 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing [INFO] [stdout] --> mod.rs:223:17 [INFO] [stdout] | [INFO] [stdout] 223 | drop(tts.next()); [INFO] [stdout] | ^^^^^----------^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `Option<&proc_macro::TokenTree>` [INFO] [stdout] ... [INFO] [stdout] 276 | if parse_optional_semicolons!().is_none() { [INFO] [stdout] | ---------------------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `parse_optional_semicolons` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 223 - drop(tts.next()); [INFO] [stdout] 223 + let _ = tts.next(); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item [INFO] [stdout] --> mod.rs:300:9 [INFO] [stdout] | [INFO] [stdout] 297 | / fn vec (self: Self) [INFO] [stdout] 298 | | -> Vec [INFO] [stdout] | |________________________- move the `impl` block outside of this method `vec` [INFO] [stdout] 299 | { [INFO] [stdout] 300 | impl CollectVec for T {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^----------^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | `CollectVec` is not local [INFO] [stdout] | [INFO] [stdout] = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl` [INFO] [stdout] = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue [INFO] [stdout] = note: `#[warn(non_local_definitions)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s [INFO] running `Command { std: "docker" "inspect" "812003970e885b8f449055e2a3d8b70f6bde1fee105f2a8ddd86947e3fc4fab7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "812003970e885b8f449055e2a3d8b70f6bde1fee105f2a8ddd86947e3fc4fab7", kill_on_drop: false }` [INFO] [stdout] 812003970e885b8f449055e2a3d8b70f6bde1fee105f2a8ddd86947e3fc4fab7