[INFO] fetching crate argwerk 0.20.4...
[INFO] checking argwerk-0.20.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate argwerk 0.20.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate argwerk 0.20.4 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 argwerk 0.20.4
[INFO] finished tweaking crates.io crate argwerk 0.20.4
[INFO] tweaked toml for crates.io crate argwerk 0.20.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate argwerk 0.20.4 already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 904446a3113b1691f5d3cf5ab9353e0368b722179e353672626f270861a84566
[INFO] running `Command { std: "docker" "start" "-a" "904446a3113b1691f5d3cf5ab9353e0368b722179e353672626f270861a84566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "904446a3113b1691f5d3cf5ab9353e0368b722179e353672626f270861a84566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "904446a3113b1691f5d3cf5ab9353e0368b722179e353672626f270861a84566", kill_on_drop: false }`
[INFO] [stdout] 904446a3113b1691f5d3cf5ab9353e0368b722179e353672626f270861a84566
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 837222970dbb9731821d43c40bb87da9ef4fefe7b835781fdeb484958e2c2435
[INFO] running `Command { std: "docker" "start" "-a" "837222970dbb9731821d43c40bb87da9ef4fefe7b835781fdeb484958e2c2435", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.65
[INFO] [stderr]     Checking argwerk v0.20.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "837222970dbb9731821d43c40bb87da9ef4fefe7b835781fdeb484958e2c2435", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "837222970dbb9731821d43c40bb87da9ef4fefe7b835781fdeb484958e2c2435", kill_on_drop: false }`
[INFO] [stdout] 837222970dbb9731821d43c40bb87da9ef4fefe7b835781fdeb484958e2c2435
[INFO] checking argwerk-0.20.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate argwerk 0.20.4 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate argwerk 0.20.4 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 argwerk 0.20.4
[INFO] finished tweaking crates.io crate argwerk 0.20.4
[INFO] tweaked toml for crates.io crate argwerk 0.20.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate argwerk 0.20.4 already has a lockfile, it will not be regenerated
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 542887887be2ebe9f13352ced047dfa432358e0d3bda29de8eceaec29ecb0da7
[INFO] running `Command { std: "docker" "start" "-a" "542887887be2ebe9f13352ced047dfa432358e0d3bda29de8eceaec29ecb0da7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "542887887be2ebe9f13352ced047dfa432358e0d3bda29de8eceaec29ecb0da7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "542887887be2ebe9f13352ced047dfa432358e0d3bda29de8eceaec29ecb0da7", kill_on_drop: false }`
[INFO] [stdout] 542887887be2ebe9f13352ced047dfa432358e0d3bda29de8eceaec29ecb0da7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 06dc635b0452c921db14db5587cf29874917e92814cb74181a68806446a082db
[INFO] running `Command { std: "docker" "start" "-a" "06dc635b0452c921db14db5587cf29874917e92814cb74181a68806446a082db", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.65
[INFO] [stderr]     Checking argwerk v0.20.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "06dc635b0452c921db14db5587cf29874917e92814cb74181a68806446a082db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06dc635b0452c921db14db5587cf29874917e92814cb74181a68806446a082db", kill_on_drop: false }`
[INFO] [stdout] 06dc635b0452c921db14db5587cf29874917e92814cb74181a68806446a082db