[INFO] fetching crate dots-and-boxes 0.1.0...
[INFO] checking dots-and-boxes-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate dots-and-boxes 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate dots-and-boxes 0.1.0 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 dots-and-boxes 0.1.0
[INFO] finished tweaking crates.io crate dots-and-boxes 0.1.0
[INFO] tweaked toml for crates.io crate dots-and-boxes 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate dots-and-boxes 0.1.0 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 cmake v0.1.48
[INFO] [stderr]   Downloaded version-compare v0.1.0
[INFO] [stderr]   Downloaded sdl2 v0.35.2
[INFO] [stderr]   Downloaded sdl2-sys v0.35.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] dc5846ea88e65137d99eeb10ae952bd04b4b4ec1d9f5bd24100a486ad065a539
[INFO] running `Command { std: "docker" "start" "-a" "dc5846ea88e65137d99eeb10ae952bd04b4b4ec1d9f5bd24100a486ad065a539", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc5846ea88e65137d99eeb10ae952bd04b4b4ec1d9f5bd24100a486ad065a539", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc5846ea88e65137d99eeb10ae952bd04b4b4ec1d9f5bd24100a486ad065a539", kill_on_drop: false }`
[INFO] [stdout] dc5846ea88e65137d99eeb10ae952bd04b4b4ec1d9f5bd24100a486ad065a539
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f4b4affede0479dad36d0584cee4502e725f3c188997564018331c5ab92a103e
[INFO] running `Command { std: "docker" "start" "-a" "f4b4affede0479dad36d0584cee4502e725f3c188997564018331c5ab92a103e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]    Compiling version-compare v0.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling sdl2 v0.35.2
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]     Checking dots-and-boxes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `COLOR_NAMES`
[INFO] [stdout]  --> src/options.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::colors::{COLOR_NAMES, self};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `COLOR_NAMES`
[INFO] [stdout]  --> src/options.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::colors::{COLOR_NAMES, self};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_to_terminal` is never used
[INFO] [stdout]    --> src/logic.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl DotsAndBoxesState {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn print_to_terminal(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_to_terminal` is never used
[INFO] [stdout]    --> src/logic.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl DotsAndBoxesState {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn print_to_terminal(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 08s
[INFO] running `Command { std: "docker" "inspect" "f4b4affede0479dad36d0584cee4502e725f3c188997564018331c5ab92a103e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4b4affede0479dad36d0584cee4502e725f3c188997564018331c5ab92a103e", kill_on_drop: false }`
[INFO] [stdout] f4b4affede0479dad36d0584cee4502e725f3c188997564018331c5ab92a103e
[INFO] checking dots-and-boxes-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate dots-and-boxes 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate dots-and-boxes 0.1.0 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 dots-and-boxes 0.1.0
[INFO] finished tweaking crates.io crate dots-and-boxes 0.1.0
[INFO] tweaked toml for crates.io crate dots-and-boxes 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate dots-and-boxes 0.1.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 221ee468929a9b9e52cff2f284ed234fc661ff6029fed4486e8fab5a4e4775a5
[INFO] running `Command { std: "docker" "start" "-a" "221ee468929a9b9e52cff2f284ed234fc661ff6029fed4486e8fab5a4e4775a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "221ee468929a9b9e52cff2f284ed234fc661ff6029fed4486e8fab5a4e4775a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "221ee468929a9b9e52cff2f284ed234fc661ff6029fed4486e8fab5a4e4775a5", kill_on_drop: false }`
[INFO] [stdout] 221ee468929a9b9e52cff2f284ed234fc661ff6029fed4486e8fab5a4e4775a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 7a622032bd37f86212070c409ac04f8e5fc26ce3d40af1b276630d5d07aaf4d9
[INFO] running `Command { std: "docker" "start" "-a" "7a622032bd37f86212070c409ac04f8e5fc26ce3d40af1b276630d5d07aaf4d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]    Compiling version-compare v0.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling sdl2 v0.35.2
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]     Checking dots-and-boxes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `COLOR_NAMES`
[INFO] [stdout]  --> src/options.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::colors::{COLOR_NAMES, self};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `COLOR_NAMES`
[INFO] [stdout]  --> src/options.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::colors::{COLOR_NAMES, self};
[INFO] [stdout]   |                     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_to_terminal` is never used
[INFO] [stdout]    --> src/logic.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl DotsAndBoxesState {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn print_to_terminal(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_to_terminal` is never used
[INFO] [stdout]    --> src/logic.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 25  | impl DotsAndBoxesState {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn print_to_terminal(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 23s
[INFO] running `Command { std: "docker" "inspect" "7a622032bd37f86212070c409ac04f8e5fc26ce3d40af1b276630d5d07aaf4d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a622032bd37f86212070c409ac04f8e5fc26ce3d40af1b276630d5d07aaf4d9", kill_on_drop: false }`
[INFO] [stdout] 7a622032bd37f86212070c409ac04f8e5fc26ce3d40af1b276630d5d07aaf4d9