[INFO] updating cached repository 0queue/rust-ctree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/0queue/rust-ctree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/0queue/rust-ctree" "work/ex/beta-1.37-6/sources/1.36.0/gh/0queue/rust-ctree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/0queue/rust-ctree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/0queue/rust-ctree" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f2e86ab0cf34ff203683285e754f862113fc2bc4
[INFO] sha for GitHub repo 0queue/rust-ctree: f2e86ab0cf34ff203683285e754f862113fc2bc4
[INFO] validating manifest of 0queue/rust-ctree on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 0queue/rust-ctree on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 0queue/rust-ctree
[INFO] finished frobbing 0queue/rust-ctree
[INFO] frobbed toml for 0queue/rust-ctree written to work/ex/beta-1.37-6/sources/1.36.0/gh/0queue/rust-ctree/Cargo.toml
[INFO] started frobbing 0queue/rust-ctree
[INFO] finished frobbing 0queue/rust-ctree
[INFO] frobbed toml for 0queue/rust-ctree written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree/Cargo.toml
[INFO] crate 0queue/rust-ctree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing 0queue/rust-ctree against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] ff979f5a92c7b6470da416a8377459a44bde6792987bc06aea857ecd1239087e
[INFO] running `"docker" "start" "-a" "ff979f5a92c7b6470da416a8377459a44bde6792987bc06aea857ecd1239087e"`
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used 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 term-painter v0.2.3
[INFO] [stderr]    Compiling rust-ctree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.03s
[INFO] running `"docker" "inspect" "ff979f5a92c7b6470da416a8377459a44bde6792987bc06aea857ecd1239087e"`
[INFO] running `"docker" "rm" "-f" "ff979f5a92c7b6470da416a8377459a44bde6792987bc06aea857ecd1239087e"`
[INFO] [stdout] ff979f5a92c7b6470da416a8377459a44bde6792987bc06aea857ecd1239087e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] c42529dc1347a5b8657947b6a13e5ffc355ae234dd98ed4e974c88e29199fea4
[INFO] running `"docker" "start" "-a" "c42529dc1347a5b8657947b6a13e5ffc355ae234dd98ed4e974c88e29199fea4"`
[INFO] [stderr]    Compiling rust-ctree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "c42529dc1347a5b8657947b6a13e5ffc355ae234dd98ed4e974c88e29199fea4"`
[INFO] running `"docker" "rm" "-f" "c42529dc1347a5b8657947b6a13e5ffc355ae234dd98ed4e974c88e29199fea4"`
[INFO] [stdout] c42529dc1347a5b8657947b6a13e5ffc355ae234dd98ed4e974c88e29199fea4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/0queue/rust-ctree:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 9d8d6fe8143aa670f775da26611522a09f8cfa585d19fa3e1f3f9ae6abe5d7c5
[INFO] running `"docker" "start" "-a" "9d8d6fe8143aa670f775da26611522a09f8cfa585d19fa3e1f3f9ae6abe5d7c5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_ctree-2f33c5b97d3d3032
[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" "9d8d6fe8143aa670f775da26611522a09f8cfa585d19fa3e1f3f9ae6abe5d7c5"`
[INFO] running `"docker" "rm" "-f" "9d8d6fe8143aa670f775da26611522a09f8cfa585d19fa3e1f3f9ae6abe5d7c5"`
[INFO] [stdout] 9d8d6fe8143aa670f775da26611522a09f8cfa585d19fa3e1f3f9ae6abe5d7c5