[INFO] fetching crate empty 0.0.4...
[INFO] checking empty-0.0.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate empty 0.0.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate empty 0.0.4 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 empty 0.0.4
[INFO] finished tweaking crates.io crate empty 0.0.4
[INFO] tweaked toml for crates.io crate empty 0.0.4 written to /workspace/builds/worker-2-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 2 packages
[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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b3aca10cfc68c0b5c70ffeb82acaa326b80f94ef68078f7f3c6c47cab7df4f28
[INFO] running `Command { std: "docker" "start" "-a" "b3aca10cfc68c0b5c70ffeb82acaa326b80f94ef68078f7f3c6c47cab7df4f28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3aca10cfc68c0b5c70ffeb82acaa326b80f94ef68078f7f3c6c47cab7df4f28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3aca10cfc68c0b5c70ffeb82acaa326b80f94ef68078f7f3c6c47cab7df4f28", kill_on_drop: false }`
[INFO] [stdout] b3aca10cfc68c0b5c70ffeb82acaa326b80f94ef68078f7f3c6c47cab7df4f28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 98ce1dcfc08c922253bb3375c1201e7e418ecaf6b91d34fa143ee0fa8be34817
[INFO] running `Command { std: "docker" "start" "-a" "98ce1dcfc08c922253bb3375c1201e7e418ecaf6b91d34fa143ee0fa8be34817", kill_on_drop: false }`
[INFO] [stderr]     Checking empty v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `void` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 6   | extern crate void;
[INFO] [stdout]     | ------------------ the item `void` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 188 |     use void;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` 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 0.21s
[INFO] running `Command { std: "docker" "inspect" "98ce1dcfc08c922253bb3375c1201e7e418ecaf6b91d34fa143ee0fa8be34817", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98ce1dcfc08c922253bb3375c1201e7e418ecaf6b91d34fa143ee0fa8be34817", kill_on_drop: false }`
[INFO] [stdout] 98ce1dcfc08c922253bb3375c1201e7e418ecaf6b91d34fa143ee0fa8be34817
[INFO] checking empty-0.0.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate empty 0.0.4 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate empty 0.0.4 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate empty 0.0.4
[INFO] finished tweaking crates.io crate empty 0.0.4
[INFO] tweaked toml for crates.io crate empty 0.0.4 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a2fb09fa646cba1521565b3f5b90af9c30197b9321f907ce7bb4123faa6f312
[INFO] running `Command { std: "docker" "start" "-a" "9a2fb09fa646cba1521565b3f5b90af9c30197b9321f907ce7bb4123faa6f312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a2fb09fa646cba1521565b3f5b90af9c30197b9321f907ce7bb4123faa6f312", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a2fb09fa646cba1521565b3f5b90af9c30197b9321f907ce7bb4123faa6f312", kill_on_drop: false }`
[INFO] [stdout] 9a2fb09fa646cba1521565b3f5b90af9c30197b9321f907ce7bb4123faa6f312
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c9fee4bd6fd1dcb4dd6725026c53ca21477ffcb28e9567d2cbef3353af64b2b
[INFO] running `Command { std: "docker" "start" "-a" "3c9fee4bd6fd1dcb4dd6725026c53ca21477ffcb28e9567d2cbef3353af64b2b", kill_on_drop: false }`
[INFO] [stderr]     Checking empty v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `void` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 6   | extern crate void;
[INFO] [stdout]     | ------------------ the item `void` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 188 |     use void;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` 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 0.18s
[INFO] running `Command { std: "docker" "inspect" "3c9fee4bd6fd1dcb4dd6725026c53ca21477ffcb28e9567d2cbef3353af64b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c9fee4bd6fd1dcb4dd6725026c53ca21477ffcb28e9567d2cbef3353af64b2b", kill_on_drop: false }`
[INFO] [stdout] 3c9fee4bd6fd1dcb4dd6725026c53ca21477ffcb28e9567d2cbef3353af64b2b