[INFO] cloning repository https://github.com/DSWhiteHat/c_borrow_checker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DSWhiteHat/c_borrow_checker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDSWhiteHat%2Fc_borrow_checker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDSWhiteHat%2Fc_borrow_checker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8a2c232110431a374ee390f83b6c06c4ffd619e4
[INFO] checking DSWhiteHat/c_borrow_checker against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDSWhiteHat%2Fc_borrow_checker" "/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/DSWhiteHat/c_borrow_checker 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/DSWhiteHat/c_borrow_checker
[INFO] finished tweaking git repo https://github.com/DSWhiteHat/c_borrow_checker
[INFO] tweaked toml for git repo https://github.com/DSWhiteHat/c_borrow_checker written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/DSWhiteHat/c_borrow_checker 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lang-c v0.15.0
[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] 5eb91efef1e4c4494330fd3a5feef7c35a3805f3a200c5f3c083dca972e94df3
[INFO] running `Command { std: "docker" "start" "-a" "5eb91efef1e4c4494330fd3a5feef7c35a3805f3a200c5f3c083dca972e94df3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5eb91efef1e4c4494330fd3a5feef7c35a3805f3a200c5f3c083dca972e94df3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5eb91efef1e4c4494330fd3a5feef7c35a3805f3a200c5f3c083dca972e94df3", kill_on_drop: false }`
[INFO] [stdout] 5eb91efef1e4c4494330fd3a5feef7c35a3805f3a200c5f3c083dca972e94df3
[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] ccf1e352a26ccdd2b7c34a9f7066871ea2b24318f6b113da77cbd8c8938b489b
[INFO] running `Command { std: "docker" "start" "-a" "ccf1e352a26ccdd2b7c34a9f7066871ea2b24318f6b113da77cbd8c8938b489b", kill_on_drop: false }`
[INFO] [stderr]     Checking lang-c v0.15.0
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.2
[INFO] [stderr]     Checking c_borrow_checker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `lang_c::loc`
[INFO] [stdout]  --> src/ast_traversal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use lang_c::loc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lang_c::loc`
[INFO] [stdout]  --> src/ast_traversal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use lang_c::loc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/borrow_checker.rs:796:61
[INFO] [stdout]     |
[INFO] [stdout] 796 |     pub fn announce_if_non_copy_behind_reference(&mut self, name: String, span: &span::Span) {
[INFO] [stdout]     |                                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/borrow_checker.rs:796:61
[INFO] [stdout]     |
[INFO] [stdout] 796 |     pub fn announce_if_non_copy_behind_reference(&mut self, name: String, span: &span::Span) {
[INFO] [stdout]     |                                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ownership` and `Reference` are never constructed
[INFO] [stdout]   --> src/borrow_checker.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum PrintType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 11 |     Ownership,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 12 |     Reference,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Ownership` and `Reference` are never constructed
[INFO] [stdout]   --> src/borrow_checker.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum PrintType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 11 |     Ownership,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 12 |     Reference,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[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 0.87s
[INFO] running `Command { std: "docker" "inspect" "ccf1e352a26ccdd2b7c34a9f7066871ea2b24318f6b113da77cbd8c8938b489b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccf1e352a26ccdd2b7c34a9f7066871ea2b24318f6b113da77cbd8c8938b489b", kill_on_drop: false }`
[INFO] [stdout] ccf1e352a26ccdd2b7c34a9f7066871ea2b24318f6b113da77cbd8c8938b489b
[INFO] checking DSWhiteHat/c_borrow_checker against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDSWhiteHat%2Fc_borrow_checker" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DSWhiteHat/c_borrow_checker 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/DSWhiteHat/c_borrow_checker
[INFO] finished tweaking git repo https://github.com/DSWhiteHat/c_borrow_checker
[INFO] tweaked toml for git repo https://github.com/DSWhiteHat/c_borrow_checker written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/DSWhiteHat/c_borrow_checker 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] df413071521b6a42e01d96dbe1215a7c2814908bac0bc0022007d2197a3c2d5a
[INFO] running `Command { std: "docker" "start" "-a" "df413071521b6a42e01d96dbe1215a7c2814908bac0bc0022007d2197a3c2d5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df413071521b6a42e01d96dbe1215a7c2814908bac0bc0022007d2197a3c2d5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df413071521b6a42e01d96dbe1215a7c2814908bac0bc0022007d2197a3c2d5a", kill_on_drop: false }`
[INFO] [stdout] df413071521b6a42e01d96dbe1215a7c2814908bac0bc0022007d2197a3c2d5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a4e39b0b3d4e4cfdd2d7ab6d22bd163abecec4df7b2ac9a87a64ec9c506fd6ed
[INFO] running `Command { std: "docker" "start" "-a" "a4e39b0b3d4e4cfdd2d7ab6d22bd163abecec4df7b2ac9a87a64ec9c506fd6ed", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking lang-c v0.15.0
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex v1.7.2
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.7.2/src/exec.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 849 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 850 | |                 self.cache.value(),
[INFO] [stdout] 851 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 862 | |                 Quit => return Some(Quit),
[INFO] [stdout] 863 | |             };
[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 `regex` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a4e39b0b3d4e4cfdd2d7ab6d22bd163abecec4df7b2ac9a87a64ec9c506fd6ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4e39b0b3d4e4cfdd2d7ab6d22bd163abecec4df7b2ac9a87a64ec9c506fd6ed", kill_on_drop: false }`
[INFO] [stdout] a4e39b0b3d4e4cfdd2d7ab6d22bd163abecec4df7b2ac9a87a64ec9c506fd6ed