[INFO] fetching crate color-backtrace 0.6.1...
[INFO] checking color-backtrace-0.6.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate color-backtrace 0.6.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate color-backtrace 0.6.1 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 color-backtrace 0.6.1
[INFO] finished tweaking crates.io crate color-backtrace 0.6.1
[INFO] tweaked toml for crates.io crate color-backtrace 0.6.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate color-backtrace 0.6.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 472a99c49de226df48c1dec5a3ec4afd9f929d9c327769cf753a3ea9f5ad03f1
[INFO] running `Command { std: "docker" "start" "-a" "472a99c49de226df48c1dec5a3ec4afd9f929d9c327769cf753a3ea9f5ad03f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "472a99c49de226df48c1dec5a3ec4afd9f929d9c327769cf753a3ea9f5ad03f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "472a99c49de226df48c1dec5a3ec4afd9f929d9c327769cf753a3ea9f5ad03f1", kill_on_drop: false }`
[INFO] [stdout] 472a99c49de226df48c1dec5a3ec4afd9f929d9c327769cf753a3ea9f5ad03f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] e977c9b1a06474db246cc22f5500258dfef749da1ce02c8ff4979d81ad5d528b
[INFO] running `Command { std: "docker" "start" "-a" "e977c9b1a06474db246cc22f5500258dfef749da1ce02c8ff4979d81ad5d528b", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking gimli v0.27.3
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]    Compiling backtrace v0.3.68
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking object v0.31.1
[INFO] [stderr]     Checking addr2line v0.20.0
[INFO] [stderr]     Checking color-backtrace v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.09s
[INFO] running `Command { std: "docker" "inspect" "e977c9b1a06474db246cc22f5500258dfef749da1ce02c8ff4979d81ad5d528b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e977c9b1a06474db246cc22f5500258dfef749da1ce02c8ff4979d81ad5d528b", kill_on_drop: false }`
[INFO] [stdout] e977c9b1a06474db246cc22f5500258dfef749da1ce02c8ff4979d81ad5d528b
[INFO] checking color-backtrace-0.6.1 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate color-backtrace 0.6.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate color-backtrace 0.6.1 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 color-backtrace 0.6.1
[INFO] finished tweaking crates.io crate color-backtrace 0.6.1
[INFO] tweaked toml for crates.io crate color-backtrace 0.6.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate color-backtrace 0.6.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 02b76bd3a0cc37fb3bc49ea7ab0dc67845132d32ecde6d07a2a6bf6b078a7498
[INFO] running `Command { std: "docker" "start" "-a" "02b76bd3a0cc37fb3bc49ea7ab0dc67845132d32ecde6d07a2a6bf6b078a7498", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02b76bd3a0cc37fb3bc49ea7ab0dc67845132d32ecde6d07a2a6bf6b078a7498", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02b76bd3a0cc37fb3bc49ea7ab0dc67845132d32ecde6d07a2a6bf6b078a7498", kill_on_drop: false }`
[INFO] [stdout] 02b76bd3a0cc37fb3bc49ea7ab0dc67845132d32ecde6d07a2a6bf6b078a7498
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] e603e0628c5c9413eb5a52366a090feb0f2a55f1fa5dda12761e02babd38bb96
[INFO] running `Command { std: "docker" "start" "-a" "e603e0628c5c9413eb5a52366a090feb0f2a55f1fa5dda12761e02babd38bb96", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling backtrace v0.3.68
[INFO] [stderr]     Checking gimli v0.27.3
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking object v0.31.1
[INFO] [stderr]     Checking addr2line v0.20.0
[INFO] [stderr]     Checking color-backtrace v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.64s
[INFO] running `Command { std: "docker" "inspect" "e603e0628c5c9413eb5a52366a090feb0f2a55f1fa5dda12761e02babd38bb96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e603e0628c5c9413eb5a52366a090feb0f2a55f1fa5dda12761e02babd38bb96", kill_on_drop: false }`
[INFO] [stdout] e603e0628c5c9413eb5a52366a090feb0f2a55f1fa5dda12761e02babd38bb96