Package: rust-mysqlclient-sys Severity: serious I was looking at why rust-diesel was not migrating to testing (other than the freeze obviously) and noticed that rust-mysqlclient-sys was not built on 32-bit architectures. As with a bunch of other packages I correctly suspected this was mostly a case of unportable bindgen-generated tests and started preparing fixes for them.
However while doing so, I rapidly came to the conclusion that something else was wrong. Specifically I noticed significant discrepancies between the "mysql" (actually mariadb) C headers on my system and the rust bindings in rust-mysqlclient-sys. The tests in the crate only test that the size/alignment of the structures defined in the crate are consistent with what they were when the bindings were generated. They do not check in any way that they are consistent with the structures defined by the C headers on the user's system. There are no functional tests either. My conclusion is that attempting to use this crate with mariadb is highly unsound, though I don't know enough about how the mysql client library is used to determine in what way exactly it will break and whether the breakage is likely to be immediately apparent or more subtle.
