If everything works really well, then it goes like the following:
- A user submits a well-researched bug report to the PostgreSQL hackers' list.
- Some discussions follow on the list, and the user may be asked to provide some additional information.
- Somebody finds out what is wrong and proposes a fix.
- The fix is discussed on the hackers' list.
- The bug is fixed. There is a patch for the current version, and the fix is sure to be included in the next version.
- Sometimes, the fix is backported to older versions.
Unfortunately, any step may go wrong due to various reasons, such as nobody feeling that this is their area of expertise, the right people not having time and hoping for someone else to deal with it, and these other people not reading the list at the right moment.
If this happens, follow up your question in a day or two to try to understand why there was no reaction.