[INFO] updating cached repository jechase/rlox
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jechase/rlox
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jechase/rlox" "work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/jechase/rlox"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/jechase/rlox'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jechase/rlox" "work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/jechase/rlox"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/jechase/rlox'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 230eb638a84406f9de10f057b182bc3baa465242
[INFO] sha for GitHub repo jechase/rlox: 230eb638a84406f9de10f057b182bc3baa465242
[INFO] validating manifest of jechase/rlox on toolchain master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jechase/rlox on toolchain try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jechase/rlox
[INFO] finished frobbing jechase/rlox
[INFO] frobbed toml for jechase/rlox written to work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/jechase/rlox/Cargo.toml
[INFO] started frobbing jechase/rlox
[INFO] finished frobbing jechase/rlox
[INFO] frobbed toml for jechase/rlox written to work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/jechase/rlox/Cargo.toml
[INFO] crate jechase/rlox already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jechase/rlox against try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af for pr-61753
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61753/worker-1/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/jechase/rlox:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] abb182ea2757d9f4085fec8f53420d8152c90507d42ca24864522ba1792baedf
[INFO] running `"docker" "start" "-a" "abb182ea2757d9f4085fec8f53420d8152c90507d42ca24864522ba1792baedf"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.18
[INFO] [stderr]    Compiling display_derive v0.0.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib/scanner.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 193 |         let text = self.source.get(self.start..self.current).unwrap();
[INFO] [stderr]     |                    ----------- immutable borrow occurs here
[INFO] [stderr] 194 |         self.build_token(
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here
[INFO] [stderr] 195 |             TokenType::Number,
[INFO] [stderr] 196 |             Primitive::Number(f64::from_str(text).expect(&format!("parse float: {}", text))),
[INFO] [stderr]     |                                             ---- immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib/scanner.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 193 |         let text = self.source.get(self.start..self.current).unwrap();
[INFO] [stderr]     |                    ----------- immutable borrow occurs here
[INFO] [stderr] 194 |         self.build_token(
[INFO] [stderr]     |         ^^^^ mutable borrow occurs here
[INFO] [stderr] 195 |             TokenType::Number,
[INFO] [stderr] 196 |             Primitive::Number(f64::from_str(text).expect(&format!("parse float: {}", text))),
[INFO] [stderr]     |                                             ---- immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: Could not compile `rlox`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Could not compile `rlox`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "abb182ea2757d9f4085fec8f53420d8152c90507d42ca24864522ba1792baedf"`
[INFO] running `"docker" "rm" "-f" "abb182ea2757d9f4085fec8f53420d8152c90507d42ca24864522ba1792baedf"`
[INFO] [stdout] abb182ea2757d9f4085fec8f53420d8152c90507d42ca24864522ba1792baedf