[INFO] updating cached repository Etenil/irontray
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Etenil/irontray
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Etenil/irontray" "work/ex/beta-1.38-1/sources/1.37.0/gh/Etenil/irontray"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Etenil/irontray'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Etenil/irontray" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Etenil/irontray"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Etenil/irontray'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 287874c76a82345f684d4b971c8864e6ed6e8296
[INFO] sha for GitHub repo Etenil/irontray: 287874c76a82345f684d4b971c8864e6ed6e8296
[INFO] validating manifest of Etenil/irontray 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 Etenil/irontray 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 Etenil/irontray
[INFO] finished frobbing Etenil/irontray
[INFO] frobbed toml for Etenil/irontray written to work/ex/beta-1.38-1/sources/1.37.0/gh/Etenil/irontray/Cargo.toml
[INFO] started frobbing Etenil/irontray
[INFO] finished frobbing Etenil/irontray
[INFO] frobbed toml for Etenil/irontray written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Etenil/irontray/Cargo.toml
[INFO] crate Etenil/irontray already has a lockfile, it will not be regenerated
[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 Etenil/irontray 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Etenil/irontray:/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] f8d5728f2e47d04ddb672e864adf75b05d2910598632dc81237bfa4b18d9151c
[INFO] running `"docker" "start" "-a" "f8d5728f2e47d04ddb672e864adf75b05d2910598632dc81237bfa4b18d9151c"`
[INFO] [stderr]    Compiling winapi v0.2.6
[INFO] [stderr]    Compiling libc v0.2.8
[INFO] [stderr]    Compiling libc v0.1.8
[INFO] [stderr]    Compiling debug-builders v0.1.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.18
[INFO] [stderr]    Compiling kernel32-sys v0.2.1
[INFO] [stderr] error[E0642]: patterns aren't allowed in methods without bodies
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.3.18/src/serialize.rs:145:45
[INFO] [stderr]     |
[INFO] [stderr] 145 |                                             &f_name: &str,
[INFO] [stderr]     |                                             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling log v0.3.1
[INFO] [stderr]    Compiling unix_socket v0.4.6
[INFO] [stderr]    Compiling time v0.1.34
[INFO] [stderr]    Compiling getopts v0.2.11
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.11/src/lib.rs:974:33
[INFO] [stderr]     |
[INFO] [stderr] 921 |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]     |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 925 |         state = match (state, whitespace, limit) {
[INFO] [stderr]     |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 974 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]     |                                 ^ use of borrowed `state`
[INFO] [stderr] 975 |         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 syslog v3.1.0
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0642`.
[INFO] [stderr] error: Could not compile `rustc-serialize`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f8d5728f2e47d04ddb672e864adf75b05d2910598632dc81237bfa4b18d9151c"`
[INFO] running `"docker" "rm" "-f" "f8d5728f2e47d04ddb672e864adf75b05d2910598632dc81237bfa4b18d9151c"`
[INFO] [stdout] f8d5728f2e47d04ddb672e864adf75b05d2910598632dc81237bfa4b18d9151c