[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 try#7df376b035b3d12ff0386ad8b45b76dbe020257b for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpat0089%2Frusty_c_compiler" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[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-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pat0089/rusty_c_compiler on toolchain 7df376b035b3d12ff0386ad8b45b76dbe020257b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f133860daac816d9825068db8db557bce6bcdc879c09b022fbcff1f9f8587cff
[INFO] running `Command { std: "docker" "start" "-a" "f133860daac816d9825068db8db557bce6bcdc879c09b022fbcff1f9f8587cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f133860daac816d9825068db8db557bce6bcdc879c09b022fbcff1f9f8587cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f133860daac816d9825068db8db557bce6bcdc879c09b022fbcff1f9f8587cff", kill_on_drop: false }`
[INFO] [stdout] f133860daac816d9825068db8db557bce6bcdc879c09b022fbcff1f9f8587cff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3ecd1a68a113e6128d04ffb8c9fe4f89b2e242ced3157d5e69059ceb5a6f200
[INFO] running `Command { std: "docker" "start" "-a" "f3ecd1a68a113e6128d04ffb8c9fe4f89b2e242ced3157d5e69059ceb5a6f200", 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: 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.20s
[INFO] running `Command { std: "docker" "inspect" "f3ecd1a68a113e6128d04ffb8c9fe4f89b2e242ced3157d5e69059ceb5a6f200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ecd1a68a113e6128d04ffb8c9fe4f89b2e242ced3157d5e69059ceb5a6f200", kill_on_drop: false }`
[INFO] [stdout] f3ecd1a68a113e6128d04ffb8c9fe4f89b2e242ced3157d5e69059ceb5a6f200