[INFO] crate panini 0.0.0 is already in cache
[INFO] extracting crate panini 0.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/panini/0.0.0
[INFO] extracting crate panini 0.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panini/0.0.0
[INFO] validating manifest of panini-0.0.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of panini-0.0.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing panini-0.0.0
[INFO] finished frobbing panini-0.0.0
[INFO] frobbed toml for panini-0.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/panini/0.0.0/Cargo.toml
[INFO] started frobbing panini-0.0.0
[INFO] finished frobbing panini-0.0.0
[INFO] frobbed toml for panini-0.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panini/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing panini-0.0.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/panini/0.0.0:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] c5331d93a505429eb1c6958dd3a9f3b28e0b66f23afc03da1ec587310df2e3e0
[INFO] running `"docker" "start" "-a" "c5331d93a505429eb1c6958dd3a9f3b28e0b66f23afc03da1ec587310df2e3e0"`
[INFO] [stderr]    Compiling gearley v0.0.1
[INFO] [stderr] warning[E0502]: cannot borrow `*self.g` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/gearley-0.0.1/src/recognizer.rs:113:64
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut completions = self.completions();
[INFO] [stderr]     |                               ---- mutable borrow occurs here
[INFO] [stderr] 108 |         while let Some(mut completion) = completions.next_completion() {
[INFO] [stderr]     |                                          ----------- mutable borrow later used here
[INFO] [stderr] ...
[INFO] [stderr] 113 |             if completion.origin == 0 && completion.lhs_sym == self.g.start_sym() {
[INFO] [stderr]     |                                                                ^^^^^^ immutable borrow occurs here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling panini v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.83s
[INFO] running `"docker" "inspect" "c5331d93a505429eb1c6958dd3a9f3b28e0b66f23afc03da1ec587310df2e3e0"`
[INFO] running `"docker" "rm" "-f" "c5331d93a505429eb1c6958dd3a9f3b28e0b66f23afc03da1ec587310df2e3e0"`
[INFO] [stdout] c5331d93a505429eb1c6958dd3a9f3b28e0b66f23afc03da1ec587310df2e3e0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/panini/0.0.0:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1ef290b1ec5bcd3433f712661cb207447f52e32cdbc70d1bd33f73da722a3e38
[INFO] running `"docker" "start" "-a" "1ef290b1ec5bcd3433f712661cb207447f52e32cdbc70d1bd33f73da722a3e38"`
[INFO] [stderr]    Compiling panini v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "1ef290b1ec5bcd3433f712661cb207447f52e32cdbc70d1bd33f73da722a3e38"`
[INFO] running `"docker" "rm" "-f" "1ef290b1ec5bcd3433f712661cb207447f52e32cdbc70d1bd33f73da722a3e38"`
[INFO] [stdout] 1ef290b1ec5bcd3433f712661cb207447f52e32cdbc70d1bd33f73da722a3e38
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/panini/0.0.0:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 0547cc88e1082ec880879ebfac3b820b96bb4925ef8bd93a4860e9d9d3e981a8
[INFO] running `"docker" "start" "-a" "0547cc88e1082ec880879ebfac3b820b96bb4925ef8bd93a4860e9d9d3e981a8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/panini-379fefac4ba3b68a
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests panini
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "0547cc88e1082ec880879ebfac3b820b96bb4925ef8bd93a4860e9d9d3e981a8"`
[INFO] running `"docker" "rm" "-f" "0547cc88e1082ec880879ebfac3b820b96bb4925ef8bd93a4860e9d9d3e981a8"`
[INFO] [stdout] 0547cc88e1082ec880879ebfac3b820b96bb4925ef8bd93a4860e9d9d3e981a8