[INFO] fetching crate macro_rules_attribute-proc_macro 0.2.0...
[INFO] checking macro_rules_attribute-proc_macro-0.2.0 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate macro_rules_attribute-proc_macro 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate macro_rules_attribute-proc_macro 0.2.0 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "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-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b4c17058ccb316117d1dad544778b86def115834ef239f3da6128ac900996d6
[INFO] running `Command { std: "docker" "start" "-a" "6b4c17058ccb316117d1dad544778b86def115834ef239f3da6128ac900996d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b4c17058ccb316117d1dad544778b86def115834ef239f3da6128ac900996d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b4c17058ccb316117d1dad544778b86def115834ef239f3da6128ac900996d6", kill_on_drop: false }`
[INFO] [stdout] 6b4c17058ccb316117d1dad544778b86def115834ef239f3da6128ac900996d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6221232b8e12cc65994d46ad8302c39465c2a4be78c66183b3366e90c1e029ff
[INFO] running `Command { std: "docker" "start" "-a" "6221232b8e12cc65994d46ad8302c39465c2a4be78c66183b3366e90c1e029ff", 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: 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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "6221232b8e12cc65994d46ad8302c39465c2a4be78c66183b3366e90c1e029ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6221232b8e12cc65994d46ad8302c39465c2a4be78c66183b3366e90c1e029ff", kill_on_drop: false }`
[INFO] [stdout] 6221232b8e12cc65994d46ad8302c39465c2a4be78c66183b3366e90c1e029ff