[INFO] cloning repository https://github.com/pat0089/rusty_c_compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pat0089/rusty_c_compiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpat0089%2Frusty_c_compiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpat0089%2Frusty_c_compiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6e58caf0d7dad484112fd9e99b57af10b5cf48a
[INFO] checking pat0089/rusty_c_compiler against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpat0089%2Frusty_c_compiler" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pat0089/rusty_c_compiler 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/pat0089/rusty_c_compiler
[INFO] finished tweaking git repo https://github.com/pat0089/rusty_c_compiler
[INFO] tweaked toml for git repo https://github.com/pat0089/rusty_c_compiler written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pat0089/rusty_c_compiler 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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] c64d9971eb3685fb98d047548ef122b1bd366e86a2fe669e3e46463a7903f1da
[INFO] running `Command { std: "docker" "start" "-a" "c64d9971eb3685fb98d047548ef122b1bd366e86a2fe669e3e46463a7903f1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c64d9971eb3685fb98d047548ef122b1bd366e86a2fe669e3e46463a7903f1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c64d9971eb3685fb98d047548ef122b1bd366e86a2fe669e3e46463a7903f1da", kill_on_drop: false }`
[INFO] [stdout] c64d9971eb3685fb98d047548ef122b1bd366e86a2fe669e3e46463a7903f1da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8071ce9143704d38c45904d2380d0ddaa88faaf95e9c210895e42e44addfb8c0
[INFO] running `Command { std: "docker" "start" "-a" "8071ce9143704d38c45904d2380d0ddaa88faaf95e9c210895e42e44addfb8c0", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-automata v0.4.5
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking rusty_c_compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `peek_tokens` is never used
[INFO] [stdout]    --> src/compiler/lexer.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub trait TokenStream {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn peek_tokens(&self, n: usize) -> Vec<Result<&Token, LexerError>>;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `peek_tokens` is never used
[INFO] [stdout]    --> src/compiler/lexer.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub trait TokenStream {
[INFO] [stdout]     |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 146 |     fn peek_tokens(&self, n: usize) -> Vec<Result<&Token, LexerError>>;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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 4.24s
[INFO] running `Command { std: "docker" "inspect" "8071ce9143704d38c45904d2380d0ddaa88faaf95e9c210895e42e44addfb8c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8071ce9143704d38c45904d2380d0ddaa88faaf95e9c210895e42e44addfb8c0", kill_on_drop: false }`
[INFO] [stdout] 8071ce9143704d38c45904d2380d0ddaa88faaf95e9c210895e42e44addfb8c0