[INFO] fetching crate rtf 0.6.8...
[INFO] checking rtf-0.6.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rtf 0.6.8 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rtf 0.6.8 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 rtf 0.6.8
[INFO] finished tweaking crates.io crate rtf 0.6.8
[INFO] tweaked toml for crates.io crate rtf 0.6.8 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate rtf 0.6.8 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 hibitset v0.6.3
[INFO] [stderr]   Downloaded lock_api v0.4.9
[INFO] [stderr]   Downloaded page_size v0.4.2
[INFO] [stderr]   Downloaded atom v0.3.6
[INFO] [stderr]   Downloaded uom v0.33.0
[INFO] [stderr]   Downloaded rtforth v0.6.8
[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] caa59a279b8c8d852b38d1b7b54fd32672e2dfe8747fa0834158eb97f2f7dd4e
[INFO] running `Command { std: "docker" "start" "-a" "caa59a279b8c8d852b38d1b7b54fd32672e2dfe8747fa0834158eb97f2f7dd4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "caa59a279b8c8d852b38d1b7b54fd32672e2dfe8747fa0834158eb97f2f7dd4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caa59a279b8c8d852b38d1b7b54fd32672e2dfe8747fa0834158eb97f2f7dd4e", kill_on_drop: false }`
[INFO] [stdout] caa59a279b8c8d852b38d1b7b54fd32672e2dfe8747fa0834158eb97f2f7dd4e
[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] 0a8c626dd818d469ea47596c016a7e9e7818e767f569f457eed56b1f0f90711f
[INFO] running `Command { std: "docker" "start" "-a" "0a8c626dd818d469ea47596c016a7e9e7818e767f569f457eed56b1f0f90711f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking hibitset v0.6.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking uom v0.33.0
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.3
[INFO] [stderr]     Checking crossterm v0.25.0
[INFO] [stderr]     Checking rtforth v0.6.8
[INFO] [stderr]     Checking rtf v0.6.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `UnicodeWidthChar`
[INFO] [stdout]   --> src/term.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | use unicode_width::{UnicodeWidthChar, UnicodeWidthStr};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[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] [stdout] warning: unused import: `UnicodeWidthChar`
[INFO] [stdout]   --> src/term.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | use unicode_width::{UnicodeWidthChar, UnicodeWidthStr};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[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 16.43s
[INFO] running `Command { std: "docker" "inspect" "0a8c626dd818d469ea47596c016a7e9e7818e767f569f457eed56b1f0f90711f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a8c626dd818d469ea47596c016a7e9e7818e767f569f457eed56b1f0f90711f", kill_on_drop: false }`
[INFO] [stdout] 0a8c626dd818d469ea47596c016a7e9e7818e767f569f457eed56b1f0f90711f