[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 beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 522b563520176de546f6a8f9c856f08a0913e9fb40e7f123478692a6eb2916a9
[INFO] running `"docker" "start" "-a" "522b563520176de546f6a8f9c856f08a0913e9fb40e7f123478692a6eb2916a9"`
[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 3.87s
[INFO] running `"docker" "inspect" "522b563520176de546f6a8f9c856f08a0913e9fb40e7f123478692a6eb2916a9"`
[INFO] running `"docker" "rm" "-f" "522b563520176de546f6a8f9c856f08a0913e9fb40e7f123478692a6eb2916a9"`
[INFO] [stdout] 522b563520176de546f6a8f9c856f08a0913e9fb40e7f123478692a6eb2916a9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] f4fd390fe2b3b77b96ff2069c969bed47c07edadb411fbd5c698eacb488fddc6
[INFO] running `"docker" "start" "-a" "f4fd390fe2b3b77b96ff2069c969bed47c07edadb411fbd5c698eacb488fddc6"`
[INFO] [stderr]    Compiling panini v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "f4fd390fe2b3b77b96ff2069c969bed47c07edadb411fbd5c698eacb488fddc6"`
[INFO] running `"docker" "rm" "-f" "f4fd390fe2b3b77b96ff2069c969bed47c07edadb411fbd5c698eacb488fddc6"`
[INFO] [stdout] f4fd390fe2b3b77b96ff2069c969bed47c07edadb411fbd5c698eacb488fddc6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] bdf78c07bfb4798ac5ec0f42208ca6bb609d07c5c16433329f4b24db0fb6a592
[INFO] running `"docker" "start" "-a" "bdf78c07bfb4798ac5ec0f42208ca6bb609d07c5c16433329f4b24db0fb6a592"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/panini-5feddc1d5f645415
[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] [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" "bdf78c07bfb4798ac5ec0f42208ca6bb609d07c5c16433329f4b24db0fb6a592"`
[INFO] running `"docker" "rm" "-f" "bdf78c07bfb4798ac5ec0f42208ca6bb609d07c5c16433329f4b24db0fb6a592"`
[INFO] [stdout] bdf78c07bfb4798ac5ec0f42208ca6bb609d07c5c16433329f4b24db0fb6a592