[INFO] updating cached repository https://github.com/kamalasaurus/boolean-query-parser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1afe1cad4ef2c41b15c1050800cb5a0af8cff9d1
[INFO] checking kamalasaurus/boolean-query-parser against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamalasaurus%2Fboolean-query-parser" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kamalasaurus/boolean-query-parser on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/kamalasaurus/boolean-query-parser
[INFO] finished tweaking git repo https://github.com/kamalasaurus/boolean-query-parser
[INFO] tweaked toml for git repo https://github.com/kamalasaurus/boolean-query-parser written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/kamalasaurus/boolean-query-parser already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3b7d5773928a46156729f658cc558822c8e8a0fe0d1477ac9b68f4fb4059c506
[INFO] running `"docker" "start" "-a" "3b7d5773928a46156729f658cc558822c8e8a0fe0d1477ac9b68f4fb4059c506"`
[INFO] [stderr]     Checking boolean-query-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]  --> src/main.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn main(source: &str) -> String {
[INFO] [stderr]   |    ----                  ^^^^^^ expected struct `std::string::String`, found `()`
[INFO] [stderr]   |    |
[INFO] [stderr]   |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `main` has invalid return type `std::string::String`
[INFO] [stderr]  --> src/main.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn main(source: &str) -> String {
[INFO] [stderr]   |                          ^^^^^^ `main` can only return types that implement `std::process::Termination`
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider using `()`, or a `Result`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:21:27
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn parse(source: &str) -> Vec<Token> {
[INFO] [stderr]    |    -----                  ^^^^^^^^^^ expected struct `std::vec::Vec`, found `()`
[INFO] [stderr]    |    |
[INFO] [stderr]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected struct `std::vec::Vec<Token>`
[INFO] [stderr]            found unit type `()`
[INFO] [stderr] 
[INFO] [stderr] error[E0580]: `main` function has wrong type
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn main(source: &str) -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect number of function parameters
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected fn pointer `fn() -> std::string::String`
[INFO] [stderr]              found fn pointer `for<'r> fn(&'r str) -> std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0580.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `boolean-query-parser`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]  --> src/main.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn main(source: &str) -> String {
[INFO] [stderr]   |    ----                  ^^^^^^ expected struct `std::string::String`, found `()`
[INFO] [stderr]   |    |
[INFO] [stderr]   |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:21:27
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn parse(source: &str) -> Vec<Token> {
[INFO] [stderr]    |    -----                  ^^^^^^^^^^ expected struct `std::vec::Vec`, found `()`
[INFO] [stderr]    |    |
[INFO] [stderr]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected struct `std::vec::Vec<Token>`
[INFO] [stderr]            found unit type `()`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `boolean-query-parser`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3b7d5773928a46156729f658cc558822c8e8a0fe0d1477ac9b68f4fb4059c506"`
[INFO] running `"docker" "rm" "-f" "3b7d5773928a46156729f658cc558822c8e8a0fe0d1477ac9b68f4fb4059c506"`
[INFO] [stdout] 3b7d5773928a46156729f658cc558822c8e8a0fe0d1477ac9b68f4fb4059c506
