From another non-rust programmer: all bugs you could write in C will still be there in the transpiled code and the parts that happen to not be bugs will still look as indistinguishable from bugs as they did before. Likely even more indistinguishable than before, because chances are you are better at reading idiomatic C than at reading the anti-idiomatic rust created by the transpiler. But there will likely be some low-hanging fruits of code that can subsequently be changed into idiomatic rust that simply cannot encode certain classes of bugs (without becoming as un-idiomatic as the transpiler output).