[INFO] fetching crate extfg-sigma 0.3.6...
[INFO] checking extfg-sigma-0.3.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate extfg-sigma 0.3.6 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate extfg-sigma 0.3.6 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 extfg-sigma 0.3.6
[INFO] finished tweaking crates.io crate extfg-sigma 0.3.6
[INFO] tweaked toml for crates.io crate extfg-sigma 0.3.6 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]      Locking 38 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-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] 7ab40d8fd798d2018b2884cf4c7acd5732a5cf4fede3609c7caf6a8e9558935b
[INFO] running `Command { std: "docker" "start" "-a" "7ab40d8fd798d2018b2884cf4c7acd5732a5cf4fede3609c7caf6a8e9558935b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ab40d8fd798d2018b2884cf4c7acd5732a5cf4fede3609c7caf6a8e9558935b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ab40d8fd798d2018b2884cf4c7acd5732a5cf4fede3609c7caf6a8e9558935b", kill_on_drop: false }`
[INFO] [stdout] 7ab40d8fd798d2018b2884cf4c7acd5732a5cf4fede3609c7caf6a8e9558935b
[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] 2ce260ade10d2419aa07eef5aa59c922b466d87f4e6a297ea08f363e3f3ccd45
[INFO] running `Command { std: "docker" "start" "-a" "2ce260ade10d2419aa07eef5aa59c922b466d87f4e6a297ea08f363e3f3ccd45", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking extfg-sigma v0.3.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BytesMut` is imported redundantly
[INFO] [stdout]    --> src/util.rs:204:9
[INFO] [stdout]     |
[INFO] [stdout] 204 |     use bytes::BytesMut;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 205 |
[INFO] [stdout] 206 |     use super::*;
[INFO] [stdout]     |         -------- the item `BytesMut` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "2ce260ade10d2419aa07eef5aa59c922b466d87f4e6a297ea08f363e3f3ccd45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ce260ade10d2419aa07eef5aa59c922b466d87f4e6a297ea08f363e3f3ccd45", kill_on_drop: false }`
[INFO] [stdout] 2ce260ade10d2419aa07eef5aa59c922b466d87f4e6a297ea08f363e3f3ccd45