[INFO] cloning repository https://github.com/Slimemaster0/YABFC
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Slimemaster0/YABFC" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSlimemaster0%2FYABFC", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSlimemaster0%2FYABFC'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a4848ffe954f9bdd37447d722a5631d11e9fbb4
[INFO] checking Slimemaster0/YABFC against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSlimemaster0%2FYABFC" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Slimemaster0/YABFC 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 git repo https://github.com/Slimemaster0/YABFC
[INFO] finished tweaking git repo https://github.com/Slimemaster0/YABFC
[INFO] tweaked toml for git repo https://github.com/Slimemaster0/YABFC written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Slimemaster0/YABFC 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 llvm-sys v140.1.1
[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] 1fd99931816dd322082b3de4812ced772605f1774ae1062333a88dd3f046c44c
[INFO] running `Command { std: "docker" "start" "-a" "1fd99931816dd322082b3de4812ced772605f1774ae1062333a88dd3f046c44c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fd99931816dd322082b3de4812ced772605f1774ae1062333a88dd3f046c44c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fd99931816dd322082b3de4812ced772605f1774ae1062333a88dd3f046c44c", kill_on_drop: false }`
[INFO] [stdout] 1fd99931816dd322082b3de4812ced772605f1774ae1062333a88dd3f046c44c
[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] 3df8fdf3ed2f796318143b91cf270d8a8f8831826492cb79b2276a40711a1c57
[INFO] running `Command { std: "docker" "start" "-a" "3df8fdf3ed2f796318143b91cf270d8a8f8831826492cb79b2276a40711a1c57", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling llvm-sys v140.1.1
[INFO] [stderr]     Checking yabfc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/lexer.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tokenize` is never used
[INFO] [stdout]   --> src/lexer.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn tokenize(input: char) -> Token {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn lexer(input: &String) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/lexer.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tokenize` is never used
[INFO] [stdout]   --> src/lexer.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn tokenize(input: char) -> Token {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn lexer(input: &String) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.21s
[INFO] running `Command { std: "docker" "inspect" "3df8fdf3ed2f796318143b91cf270d8a8f8831826492cb79b2276a40711a1c57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3df8fdf3ed2f796318143b91cf270d8a8f8831826492cb79b2276a40711a1c57", kill_on_drop: false }`
[INFO] [stdout] 3df8fdf3ed2f796318143b91cf270d8a8f8831826492cb79b2276a40711a1c57
[INFO] checking Slimemaster0/YABFC against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSlimemaster0%2FYABFC" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Slimemaster0/YABFC 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 git repo https://github.com/Slimemaster0/YABFC
[INFO] finished tweaking git repo https://github.com/Slimemaster0/YABFC
[INFO] tweaked toml for git repo https://github.com/Slimemaster0/YABFC written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Slimemaster0/YABFC 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1e694e33a3675d1264460649937fd2a1d1caa81802c3bdec272f6e7133142de5
[INFO] running `Command { std: "docker" "start" "-a" "1e694e33a3675d1264460649937fd2a1d1caa81802c3bdec272f6e7133142de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e694e33a3675d1264460649937fd2a1d1caa81802c3bdec272f6e7133142de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e694e33a3675d1264460649937fd2a1d1caa81802c3bdec272f6e7133142de5", kill_on_drop: false }`
[INFO] [stdout] 1e694e33a3675d1264460649937fd2a1d1caa81802c3bdec272f6e7133142de5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 364e97f5b719c20a673849f21cb8662f127233d697979cffa6f9ec6201e00efb
[INFO] running `Command { std: "docker" "start" "-a" "364e97f5b719c20a673849f21cb8662f127233d697979cffa6f9ec6201e00efb", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling llvm-sys v140.1.1
[INFO] [stderr]     Checking yabfc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/lexer.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tokenize` is never used
[INFO] [stdout]   --> src/lexer.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn tokenize(input: char) -> Token {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn lexer(input: &String) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/lexer.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tokenize` is never used
[INFO] [stdout]   --> src/lexer.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn tokenize(input: char) -> Token {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lexer` is never used
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn lexer(input: &String) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.11s
[INFO] running `Command { std: "docker" "inspect" "364e97f5b719c20a673849f21cb8662f127233d697979cffa6f9ec6201e00efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "364e97f5b719c20a673849f21cb8662f127233d697979cffa6f9ec6201e00efb", kill_on_drop: false }`
[INFO] [stdout] 364e97f5b719c20a673849f21cb8662f127233d697979cffa6f9ec6201e00efb