[INFO] fetching crate dssim-core 3.2.7...
[INFO] checking dssim-core-3.2.7 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dssim-core 3.2.7 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate dssim-core 3.2.7 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 dssim-core 3.2.7
[INFO] finished tweaking crates.io crate dssim-core 3.2.7
[INFO] tweaked toml for crates.io crate dssim-core 3.2.7 written to /workspace/builds/worker-7-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 29 packages
[INFO] [stderr]       Adding hashbrown v0.13.2 (latest: v0.14.3)
[INFO] [stderr]       Adding itertools v0.11.0 (latest: v0.12.1)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fallible_collections v0.4.9
[INFO] [stderr]   Downloaded rgb v0.8.37
[INFO] [stderr]   Downloaded imgref v1.10.1
[INFO] [stderr]   Downloaded lodepng v3.10.1
[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] b04bac158de82515d9fab1e82568e55a558f6f2a65475eb17bbdceff3d17e811
[INFO] running `Command { std: "docker" "start" "-a" "b04bac158de82515d9fab1e82568e55a558f6f2a65475eb17bbdceff3d17e811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b04bac158de82515d9fab1e82568e55a558f6f2a65475eb17bbdceff3d17e811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b04bac158de82515d9fab1e82568e55a558f6f2a65475eb17bbdceff3d17e811", kill_on_drop: false }`
[INFO] [stdout] b04bac158de82515d9fab1e82568e55a558f6f2a65475eb17bbdceff3d17e811
[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] fa9929b3252a9b57e3e033fac61880b19fdb4cea49d525bb3746e6690a71fa43
[INFO] running `Command { std: "docker" "start" "-a" "fa9929b3252a9b57e3e033fac61880b19fdb4cea49d525bb3746e6690a71fa43", kill_on_drop: false }`
[INFO] [stderr]     Checking imgref v1.10.1
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking rgb v0.8.37
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking fallible_collections v0.4.9
[INFO] [stderr]     Checking lodepng v3.10.1
[INFO] [stderr]     Checking dssim-core v3.2.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "fa9929b3252a9b57e3e033fac61880b19fdb4cea49d525bb3746e6690a71fa43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa9929b3252a9b57e3e033fac61880b19fdb4cea49d525bb3746e6690a71fa43", kill_on_drop: false }`
[INFO] [stdout] fa9929b3252a9b57e3e033fac61880b19fdb4cea49d525bb3746e6690a71fa43