[INFO] fetching crate rtf 0.6.8...
[INFO] checking rtf-0.6.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rtf 0.6.8 into /workspace/builds/worker-4-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-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.35
[INFO] [stderr]   Downloaded page_size v0.4.2
[INFO] [stderr]   Downloaded thiserror v1.0.35
[INFO] [stderr]   Downloaded unicode-ident v1.0.4
[INFO] [stderr]   Downloaded uom v0.33.0
[INFO] [stderr]   Downloaded rtforth v0.6.8
[INFO] [stderr]   Downloaded libc v0.2.133
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 0d951bec9c185afdae733fc88d805375ba67a9944b594490c62d417cbb479325
[INFO] running `Command { std: "docker" "start" "-a" "0d951bec9c185afdae733fc88d805375ba67a9944b594490c62d417cbb479325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d951bec9c185afdae733fc88d805375ba67a9944b594490c62d417cbb479325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d951bec9c185afdae733fc88d805375ba67a9944b594490c62d417cbb479325", kill_on_drop: false }`
[INFO] [stdout] 0d951bec9c185afdae733fc88d805375ba67a9944b594490c62d417cbb479325
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] fcba6514573e94f4b175cc8b800b8599d1f0363da8198e3081523a9040ff7d59
[INFO] running `Command { std: "docker" "start" "-a" "fcba6514573e94f4b175cc8b800b8599d1f0363da8198e3081523a9040ff7d59", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking hibitset v0.6.3
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking dirs-sys v0.3.7
[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 uom v0.33.0
[INFO] [stderr]     Checking approx v0.5.1
[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 19.96s
[INFO] running `Command { std: "docker" "inspect" "fcba6514573e94f4b175cc8b800b8599d1f0363da8198e3081523a9040ff7d59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcba6514573e94f4b175cc8b800b8599d1f0363da8198e3081523a9040ff7d59", kill_on_drop: false }`
[INFO] [stdout] fcba6514573e94f4b175cc8b800b8599d1f0363da8198e3081523a9040ff7d59
[INFO] checking rtf-0.6.8 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rtf 0.6.8 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rtf 0.6.8 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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-4-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d042770302e7a5614ec68e3d9b11c4b78bb14b112061235cf4d26754ca78bfc
[INFO] running `Command { std: "docker" "start" "-a" "0d042770302e7a5614ec68e3d9b11c4b78bb14b112061235cf4d26754ca78bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d042770302e7a5614ec68e3d9b11c4b78bb14b112061235cf4d26754ca78bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d042770302e7a5614ec68e3d9b11c4b78bb14b112061235cf4d26754ca78bfc", kill_on_drop: false }`
[INFO] [stdout] 0d042770302e7a5614ec68e3d9b11c4b78bb14b112061235cf4d26754ca78bfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08295e201cc5ea0f06c40b4d4dbfacf8d40895d0dbdcddb330c4334f94011bdb
[INFO] running `Command { std: "docker" "start" "-a" "08295e201cc5ea0f06c40b4d4dbfacf8d40895d0dbdcddb330c4334f94011bdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking hibitset v0.6.3
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.8.4
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking uom v0.33.0
[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: 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.12s
[INFO] running `Command { std: "docker" "inspect" "08295e201cc5ea0f06c40b4d4dbfacf8d40895d0dbdcddb330c4334f94011bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08295e201cc5ea0f06c40b4d4dbfacf8d40895d0dbdcddb330c4334f94011bdb", kill_on_drop: false }`
[INFO] [stdout] 08295e201cc5ea0f06c40b4d4dbfacf8d40895d0dbdcddb330c4334f94011bdb