The test suite fails on Windows because the Rust compiler cannot handle paths longer than 260 characters. Erlang common test and rebar add a lot of length to the path, so this issue is unlikely to arise in normal use of the rebar3_rust plugin. Ref https://github.com/rust-lang/rust/issues/32689
Excerpt of common test log:
Downloading erlang_nif-sys v0.4.2
Downloading libc v0.2.20
Compiling libc v0.2.20
Running `rustc --crate-name libc C:\Users\home\.cargo\registry\src\github.com-1ecc6299db9ec823\libc-0.2.20\src\lib.rs --crate-type lib -g --cfg "feature=\"default\"" --cfg "feature=\"use_std\"" -C metadata=83c2bd88b43ecde3 -C extra-filename=-83c2bd88b43ecde3 --out-dir c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\deps --emit=dep-info,link -L dependency=c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\deps --cap-lints allow`
Compiling erlang_nif-sys v0.4.2
Running `rustc --crate-name build_script_build C:\Users\home\.cargo\registry\src\github.com-1ecc6299db9ec823\erlang_nif-sys-0.4.2\build.rs --crate-type bin -g -C metadata=2829a1e81beb4d26 -C extra-filename=-2829a1e81beb4d26 --out-dir c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\build\erlang_nif-sys-2829a1e81beb4d26 --emit=dep-info,link -L dependency=c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\deps --extern libc=c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\deps\liblibc-83c2bd88b43ecde3.rlib --cap-lints allow`
error: failed to remove c:\Users\home\rebar3_rust\_build\test\logs\ct_run.nonode@nohost.2017-03-09_14.13.19\rebar3_rust.ct.logs\run.2017-03-09_14.13.19\log_private\test_app\crates\nifsys\target\debug\build\erlang_nif-sys-2829a1e81beb4d26\build_script_build-2829a1e81beb4d26.metadata.o: The system cannot find the path specified. (os error 3)
error: could not rename dep info: "c:\\Users\\home\\rebar3_rust\\_build\\test\\logs\\ct_run.nonode@nohost.2017-03-09_14.13.19\\rebar3_rust.ct.logs\\run.2017-03-09_14.13.19\\log_private\\test_app\\crates\\nifsys\\target\\debug\\build\\erlang_nif-sys-2829a1e81beb4d26\\build_script_build-2829a1e81beb4d26.d"
Caused by:
The system cannot find the path specified. (os error 3)
The test suite fails on Windows because the Rust compiler cannot handle paths longer than 260 characters. Erlang common test and rebar add a lot of length to the path, so this issue is unlikely to arise in normal use of the rebar3_rust plugin. Ref https://github.com/rust-lang/rust/issues/32689
Excerpt of common test log: