[INFO] cloning repository https://github.com/killercup/rust-dbg-enhancer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/killercup/rust-dbg-enhancer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkillercup%2Frust-dbg-enhancer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkillercup%2Frust-dbg-enhancer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b23942f45755414b975a5b9da90662c0de646cc
[INFO] checking killercup/rust-dbg-enhancer against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkillercup%2Frust-dbg-enhancer" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/killercup/rust-dbg-enhancer 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 git repo https://github.com/killercup/rust-dbg-enhancer
[INFO] finished tweaking git repo https://github.com/killercup/rust-dbg-enhancer
[INFO] tweaked toml for git repo https://github.com/killercup/rust-dbg-enhancer written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/killercup/rust-dbg-enhancer 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_generator v2.1.0
[INFO] [stderr]   Downloaded ucd-trie v0.1.1
[INFO] [stderr]   Downloaded pest_meta v2.1.1
[INFO] [stderr]   Downloaded snafu-derive v0.4.1
[INFO] [stderr]   Downloaded snafu v0.4.1
[INFO] [stderr]   Downloaded maplit v1.0.1
[INFO] [stderr]   Downloaded ron v0.4.2
[INFO] [stderr]   Downloaded from-pest v0.3.1
[INFO] [stderr]   Downloaded serde_derive v1.0.94
[INFO] [stderr]   Downloaded pest v2.1.1
[INFO] [stderr]   Downloaded serde v1.0.94
[INFO] [stderr]   Downloaded insta v0.8.1
[INFO] [stderr]   Downloaded ci_info v0.3.1
[INFO] [stderr]   Downloaded backtrace-sys v0.1.30
[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] 6c400795780f3b826fa4807fb2c3c98a0e681aca4436d5d0b9417ca0ca0db2ba
[INFO] running `Command { std: "docker" "start" "-a" "6c400795780f3b826fa4807fb2c3c98a0e681aca4436d5d0b9417ca0ca0db2ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c400795780f3b826fa4807fb2c3c98a0e681aca4436d5d0b9417ca0ca0db2ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c400795780f3b826fa4807fb2c3c98a0e681aca4436d5d0b9417ca0ca0db2ba", kill_on_drop: false }`
[INFO] [stdout] 6c400795780f3b826fa4807fb2c3c98a0e681aca4436d5d0b9417ca0ca0db2ba
[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] e730ca1fdc14a9603fbc4fc78c3ccf99142fbda9de80f940e2d05bc59b074909
[INFO] running `Command { std: "docker" "start" "-a" "e730ca1fdc14a9603fbc4fc78c3ccf99142fbda9de80f940e2d05bc59b074909", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]     Checking pest v2.1.1
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking ci_info v0.3.1
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]     Checking from-pest v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling snafu-derive v0.4.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling single v1.0.0
[INFO] [stderr]    Compiling pest-ast v0.3.3
[INFO] [stderr]     Checking snafu v0.4.1
[INFO] [stderr]     Checking rust-dbg-enhancer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_yaml v0.8.9
[INFO] [stderr]     Checking ron v0.4.2
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking insta v0.8.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.83s
[INFO] running `Command { std: "docker" "inspect" "e730ca1fdc14a9603fbc4fc78c3ccf99142fbda9de80f940e2d05bc59b074909", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e730ca1fdc14a9603fbc4fc78c3ccf99142fbda9de80f940e2d05bc59b074909", kill_on_drop: false }`
[INFO] [stdout] e730ca1fdc14a9603fbc4fc78c3ccf99142fbda9de80f940e2d05bc59b074909
[INFO] checking killercup/rust-dbg-enhancer against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkillercup%2Frust-dbg-enhancer" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/killercup/rust-dbg-enhancer 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 git repo https://github.com/killercup/rust-dbg-enhancer
[INFO] finished tweaking git repo https://github.com/killercup/rust-dbg-enhancer
[INFO] tweaked toml for git repo https://github.com/killercup/rust-dbg-enhancer written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/killercup/rust-dbg-enhancer 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 4832663a0e8bf7f11b622200c979120091d0dd4ce4e4f4ad1da166d25dac558e
[INFO] running `Command { std: "docker" "start" "-a" "4832663a0e8bf7f11b622200c979120091d0dd4ce4e4f4ad1da166d25dac558e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4832663a0e8bf7f11b622200c979120091d0dd4ce4e4f4ad1da166d25dac558e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4832663a0e8bf7f11b622200c979120091d0dd4ce4e4f4ad1da166d25dac558e", kill_on_drop: false }`
[INFO] [stdout] 4832663a0e8bf7f11b622200c979120091d0dd4ce4e4f4ad1da166d25dac558e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 680e80d3d2f586932e9ef5a60ad7a5fac597c545d64c7e2f233d3167a8fbaa60
[INFO] running `Command { std: "docker" "start" "-a" "680e80d3d2f586932e9ef5a60ad7a5fac597c545d64c7e2f233d3167a8fbaa60", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking pest v2.1.1
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking parking_lot_core v0.5.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking parking_lot v0.8.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking ci_info v0.3.1
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]     Checking from-pest v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.32
[INFO] [stderr]     Checking console v0.7.7
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling snafu-derive v0.4.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling single v1.0.0
[INFO] [stderr]     Checking snafu v0.4.1
[INFO] [stderr]    Compiling pest-ast v0.3.3
[INFO] [stderr]     Checking rust-dbg-enhancer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking serde_yaml v0.8.9
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]     Checking ron v0.4.2
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking insta v0.8.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.74s
[INFO] running `Command { std: "docker" "inspect" "680e80d3d2f586932e9ef5a60ad7a5fac597c545d64c7e2f233d3167a8fbaa60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "680e80d3d2f586932e9ef5a60ad7a5fac597c545d64c7e2f233d3167a8fbaa60", kill_on_drop: false }`
[INFO] [stdout] 680e80d3d2f586932e9ef5a60ad7a5fac597c545d64c7e2f233d3167a8fbaa60