[INFO] cloning repository https://github.com/hzoells/rust_text_editor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hzoells/rust_text_editor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66ddea2bd9c3baf10f3d09db5559097c84ad6b35
[INFO] checking hzoells/rust_text_editor against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hzoells/rust_text_editor on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hzoells/rust_text_editor
[INFO] finished tweaking git repo https://github.com/hzoells/rust_text_editor
[INFO] tweaked toml for git repo https://github.com/hzoells/rust_text_editor written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hzoells/rust_text_editor 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10d469c82ab20e3b2ac1b230d5d55656ab4a096e797257076b32455e4fb84193
[INFO] running `Command { std: "docker" "start" "-a" "10d469c82ab20e3b2ac1b230d5d55656ab4a096e797257076b32455e4fb84193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10d469c82ab20e3b2ac1b230d5d55656ab4a096e797257076b32455e4fb84193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10d469c82ab20e3b2ac1b230d5d55656ab4a096e797257076b32455e4fb84193", kill_on_drop: false }`
[INFO] [stdout] 10d469c82ab20e3b2ac1b230d5d55656ab4a096e797257076b32455e4fb84193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ae73b628d303d5562bb2685befa9ea9abcb5a0ea46df3fe36aba6a6f3ae356e
[INFO] running `Command { std: "docker" "start" "-a" "6ae73b628d303d5562bb2685befa9ea9abcb5a0ea46df3fe36aba6a6f3ae356e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking termion v2.0.1
[INFO] [stderr]     Checking rust_text_editor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/row.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cmp, fmt::format};
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/row.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cmp, fmt::format};
[INFO] [stdout]   |                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/editor.rs:313:13
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let mut offset = &mut self.offset;
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/editor.rs:313:13
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let mut offset = &mut self.offset;
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/terminal.rs:60:22
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let Position{mut x, mut y} = position;
[INFO] [stdout]    |                      ----^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/terminal.rs:60:29
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let Position{mut x, mut y} = position;
[INFO] [stdout]    |                             ----^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/terminal.rs:60:22
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let Position{mut x, mut y} = position;
[INFO] [stdout]    |                      ----^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/terminal.rs:60:29
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let Position{mut x, mut y} = position;
[INFO] [stdout]    |                             ----^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/editor.rs:331:13
[INFO] [stdout]     |
[INFO] [stdout] 331 |             &self.refresh_screen()?;  
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 331 |             let _ = &self.refresh_screen()?;  
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/editor.rs:331:13
[INFO] [stdout]     |
[INFO] [stdout] 331 |             &self.refresh_screen()?;  
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 331 |             let _ = &self.refresh_screen()?;  
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "6ae73b628d303d5562bb2685befa9ea9abcb5a0ea46df3fe36aba6a6f3ae356e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ae73b628d303d5562bb2685befa9ea9abcb5a0ea46df3fe36aba6a6f3ae356e", kill_on_drop: false }`
[INFO] [stdout] 6ae73b628d303d5562bb2685befa9ea9abcb5a0ea46df3fe36aba6a6f3ae356e
[INFO] checking hzoells/rust_text_editor against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhzoells%2Frust_text_editor" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hzoells/rust_text_editor on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hzoells/rust_text_editor
[INFO] finished tweaking git repo https://github.com/hzoells/rust_text_editor
[INFO] tweaked toml for git repo https://github.com/hzoells/rust_text_editor written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hzoells/rust_text_editor 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 737b42bcab704ca87a6d93012715ad0b8b94a06c777e8b094fe9e3c8c482911b
[INFO] running `Command { std: "docker" "start" "-a" "737b42bcab704ca87a6d93012715ad0b8b94a06c777e8b094fe9e3c8c482911b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "737b42bcab704ca87a6d93012715ad0b8b94a06c777e8b094fe9e3c8c482911b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "737b42bcab704ca87a6d93012715ad0b8b94a06c777e8b094fe9e3c8c482911b", kill_on_drop: false }`
[INFO] [stdout] 737b42bcab704ca87a6d93012715ad0b8b94a06c777e8b094fe9e3c8c482911b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f16da1b3f1f4d664de6bb5cf281b595deeba225dbdf3716e21865487b17c7dc7
[INFO] running `Command { std: "docker" "start" "-a" "f16da1b3f1f4d664de6bb5cf281b595deeba225dbdf3716e21865487b17c7dc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.10.1
[INFO] [stderr]     Checking termion v2.0.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/termion-2.0.1/src/input.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 | /             match self.iter.next() {
[INFO] [stdout] 20 | |                 Some(Ok(Event::Key(k))) => return Some(Ok(k)),
[INFO] [stdout] 21 | |                 Some(Ok(_)) => continue,
[INFO] [stdout] 22 | |                 Some(Err(e)) => return Some(Err(e)),
[INFO] [stdout] 23 | |                 None => return None,
[INFO] [stdout] 24 | |             };
[INFO] [stdout]    | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `termion` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f16da1b3f1f4d664de6bb5cf281b595deeba225dbdf3716e21865487b17c7dc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f16da1b3f1f4d664de6bb5cf281b595deeba225dbdf3716e21865487b17c7dc7", kill_on_drop: false }`
[INFO] [stdout] f16da1b3f1f4d664de6bb5cf281b595deeba225dbdf3716e21865487b17c7dc7