[INFO] fetching crate dscfg-client 0.1.0...
[INFO] checking dscfg-client-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dscfg-client 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate dscfg-client 0.1.0 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 dscfg-client 0.1.0
[INFO] finished tweaking crates.io crate dscfg-client 0.1.0
[INFO] tweaked toml for crates.io crate dscfg-client 0.1.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages
[INFO] [stderr]       Adding bytes v0.4.12 (latest: v1.6.0)
[INFO] [stderr]       Adding futures v0.1.31 (latest: v0.3.30)
[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 dscfg-proto v0.1.0
[INFO] [stderr]   Downloaded tokio-io v0.1.13
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1b88a7e88511fcbcaae805045c3556394d1eb1813a81cbd33e8bea5d7832160
[INFO] running `Command { std: "docker" "start" "-a" "c1b88a7e88511fcbcaae805045c3556394d1eb1813a81cbd33e8bea5d7832160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1b88a7e88511fcbcaae805045c3556394d1eb1813a81cbd33e8bea5d7832160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1b88a7e88511fcbcaae805045c3556394d1eb1813a81cbd33e8bea5d7832160", kill_on_drop: false }`
[INFO] [stdout] c1b88a7e88511fcbcaae805045c3556394d1eb1813a81cbd33e8bea5d7832160
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 15809ce9b44e3fa5164bf28baf0f1cffeb5f8c991bc986e486256c6f5acf46c2
[INFO] running `Command { std: "docker" "start" "-a" "15809ce9b44e3fa5164bf28baf0f1cffeb5f8c991bc986e486256c6f5acf46c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking dscfg-proto v0.1.0
[INFO] [stderr]     Checking dscfg-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.86s
[INFO] running `Command { std: "docker" "inspect" "15809ce9b44e3fa5164bf28baf0f1cffeb5f8c991bc986e486256c6f5acf46c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15809ce9b44e3fa5164bf28baf0f1cffeb5f8c991bc986e486256c6f5acf46c2", kill_on_drop: false }`
[INFO] [stdout] 15809ce9b44e3fa5164bf28baf0f1cffeb5f8c991bc986e486256c6f5acf46c2
[INFO] checking dscfg-client-0.1.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate dscfg-client 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate dscfg-client 0.1.0 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 dscfg-client 0.1.0
[INFO] finished tweaking crates.io crate dscfg-client 0.1.0
[INFO] tweaked toml for crates.io crate dscfg-client 0.1.0 written to /workspace/builds/worker-6-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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2f208a2dba77d60065f86f4b3552f6f9fc911f848c4e371357d7c50b1fd492f7
[INFO] running `Command { std: "docker" "start" "-a" "2f208a2dba77d60065f86f4b3552f6f9fc911f848c4e371357d7c50b1fd492f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f208a2dba77d60065f86f4b3552f6f9fc911f848c4e371357d7c50b1fd492f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f208a2dba77d60065f86f4b3552f6f9fc911f848c4e371357d7c50b1fd492f7", kill_on_drop: false }`
[INFO] [stdout] 2f208a2dba77d60065f86f4b3552f6f9fc911f848c4e371357d7c50b1fd492f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 80bb2a6a0344260a596098cd33988c1c6d2116cb74050abaa034ffa710c5cf49
[INFO] running `Command { std: "docker" "start" "-a" "80bb2a6a0344260a596098cd33988c1c6d2116cb74050abaa034ffa710c5cf49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking dscfg-proto v0.1.0
[INFO] [stderr]     Checking dscfg-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.94s
[INFO] running `Command { std: "docker" "inspect" "80bb2a6a0344260a596098cd33988c1c6d2116cb74050abaa034ffa710c5cf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80bb2a6a0344260a596098cd33988c1c6d2116cb74050abaa034ffa710c5cf49", kill_on_drop: false }`
[INFO] [stdout] 80bb2a6a0344260a596098cd33988c1c6d2116cb74050abaa034ffa710c5cf49