[INFO] fetching crate ruwren 0.4.4...
[INFO] checking ruwren-0.4.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ruwren 0.4.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate ruwren 0.4.4 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 ruwren 0.4.4
[INFO] finished tweaking crates.io crate ruwren 0.4.4
[INFO] tweaked toml for crates.io crate ruwren 0.4.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate ruwren 0.4.4 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ruwren-sys v0.4.0
[INFO] [stderr]   Downloaded clang-sys v0.29.3
[INFO] [stderr]   Downloaded bindgen v0.54.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 67bb7b40a91c365f2feaea197654941d412791c64188b6772e15f3389c22dd19
[INFO] running `Command { std: "docker" "start" "-a" "67bb7b40a91c365f2feaea197654941d412791c64188b6772e15f3389c22dd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67bb7b40a91c365f2feaea197654941d412791c64188b6772e15f3389c22dd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67bb7b40a91c365f2feaea197654941d412791c64188b6772e15f3389c22dd19", kill_on_drop: false }`
[INFO] [stdout] 67bb7b40a91c365f2feaea197654941d412791c64188b6772e15f3389c22dd19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f5ea5d6f88afc199eb320d587436b5567ad2936a9b5ae5fd1013ee6d3bb621bf
[INFO] running `Command { std: "docker" "start" "-a" "f5ea5d6f88afc199eb320d587436b5567ad2936a9b5ae5fd1013ee6d3bb621bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling memchr v2.6.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling nom v5.1.3
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling aho-corasick v1.0.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling bindgen v0.54.0
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling regex-automata v0.3.8
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling syn v2.0.30
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling regex v1.9.5
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling ruwren-sys v0.4.0
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking ruwren v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 55.80s
[INFO] running `Command { std: "docker" "inspect" "f5ea5d6f88afc199eb320d587436b5567ad2936a9b5ae5fd1013ee6d3bb621bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5ea5d6f88afc199eb320d587436b5567ad2936a9b5ae5fd1013ee6d3bb621bf", kill_on_drop: false }`
[INFO] [stdout] f5ea5d6f88afc199eb320d587436b5567ad2936a9b5ae5fd1013ee6d3bb621bf
[INFO] checking ruwren-0.4.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate ruwren 0.4.4 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate ruwren 0.4.4 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 ruwren 0.4.4
[INFO] finished tweaking crates.io crate ruwren 0.4.4
[INFO] tweaked toml for crates.io crate ruwren 0.4.4 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate ruwren 0.4.4 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 37186bbc944abb2bee35e3c6246216e660a5dcd1ba7ee6b09e34b84ac10dfb3f
[INFO] running `Command { std: "docker" "start" "-a" "37186bbc944abb2bee35e3c6246216e660a5dcd1ba7ee6b09e34b84ac10dfb3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37186bbc944abb2bee35e3c6246216e660a5dcd1ba7ee6b09e34b84ac10dfb3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37186bbc944abb2bee35e3c6246216e660a5dcd1ba7ee6b09e34b84ac10dfb3f", kill_on_drop: false }`
[INFO] [stdout] 37186bbc944abb2bee35e3c6246216e660a5dcd1ba7ee6b09e34b84ac10dfb3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] da9098cd53e57f7dd021e13439a31a546ce067349cdfa36f49b0099b369cdb71
[INFO] running `Command { std: "docker" "start" "-a" "da9098cd53e57f7dd021e13439a31a546ce067349cdfa36f49b0099b369cdb71", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling memchr v2.6.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.11
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling nom v5.1.3
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling aho-corasick v1.0.5
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling bindgen v0.54.0
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]    Compiling regex-automata v0.3.8
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling syn v2.0.30
[INFO] [stderr]    Compiling regex v1.9.5
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling ruwren-sys v0.4.0
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking ruwren v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 56.65s
[INFO] running `Command { std: "docker" "inspect" "da9098cd53e57f7dd021e13439a31a546ce067349cdfa36f49b0099b369cdb71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da9098cd53e57f7dd021e13439a31a546ce067349cdfa36f49b0099b369cdb71", kill_on_drop: false }`
[INFO] [stdout] da9098cd53e57f7dd021e13439a31a546ce067349cdfa36f49b0099b369cdb71