## 11 Bugs ¶

If you encounter something that you think is a bug, please report it. Try to include a clear description of the undesired behaviour. A test case that exhibits the bug, would also be useful.

You can report a bug with the command `M-x sgml-submit-bug-report`.

When PSGML needs contextual information it parses the document up to the point. During the parsing, it builds a parse tree. The parse tree is used to initialize the next parse, to avoid having to parse things already parsed. Changes to the buffer is supposed to prune the tree of all outdated information. But if you get strange complaints from the parser, try and back up a bit and use `C-c C-o` (`sgml-next-trouble-spot`).