[INFO] fetching crate multiconst_proc_macros 0.2.2...
[INFO] checking multiconst_proc_macros-0.2.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate multiconst_proc_macros 0.2.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate multiconst_proc_macros 0.2.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate multiconst_proc_macros 0.2.2
[INFO] finished tweaking crates.io crate multiconst_proc_macros 0.2.2
[INFO] tweaked toml for crates.io crate multiconst_proc_macros 0.2.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2cdb0c031b40e45c3afde162f3f8dee3a6e10f5da88ebcb1db3f5ebbd191b6c
[INFO] running `Command { std: "docker" "start" "-a" "f2cdb0c031b40e45c3afde162f3f8dee3a6e10f5da88ebcb1db3f5ebbd191b6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2cdb0c031b40e45c3afde162f3f8dee3a6e10f5da88ebcb1db3f5ebbd191b6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2cdb0c031b40e45c3afde162f3f8dee3a6e10f5da88ebcb1db3f5ebbd191b6c", kill_on_drop: false }`
[INFO] [stdout] f2cdb0c031b40e45c3afde162f3f8dee3a6e10f5da88ebcb1db3f5ebbd191b6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e44935b87e69f985e1cc007783709dd71d48d95b7301638a6d1b723ec2f0e47c
[INFO] running `Command { std: "docker" "start" "-a" "e44935b87e69f985e1cc007783709dd71d48d95b7301638a6d1b723ec2f0e47c", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking multiconst_proc_macros v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking proc-macro2 v1.0.79
[INFO] [stdout] warning: method `into_token_tree` is never used
[INFO] [stdout]    --> src/utils.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | pub(crate) trait TokenTreeExt: Sized {
[INFO] [stdout]     |                  ------------ method in this trait
[INFO] [stdout] 133 |     fn as_token_tree(&self) -> &TokenTree;
[INFO] [stdout] 134 |     fn into_token_tree(self) -> TokenTree;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_token_tree` is never used
[INFO] [stdout]    --> src/utils.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | pub(crate) trait TokenTreeExt: Sized {
[INFO] [stdout]     |                  ------------ method in this trait
[INFO] [stdout] 133 |     fn as_token_tree(&self) -> &TokenTree;
[INFO] [stdout] 134 |     fn into_token_tree(self) -> TokenTree;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "e44935b87e69f985e1cc007783709dd71d48d95b7301638a6d1b723ec2f0e47c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e44935b87e69f985e1cc007783709dd71d48d95b7301638a6d1b723ec2f0e47c", kill_on_drop: false }`
[INFO] [stdout] e44935b87e69f985e1cc007783709dd71d48d95b7301638a6d1b723ec2f0e47c