TYPO3 rector is a really helpful application when it comes to TYPO3 major updates. It helps you to identify and refactor TYPO3 deprecations in custom extensions and can save hours of manual refactoring. I use TYPO3 rector quite a lot and stumbled across the following error recently.
"Unterminated nested statement!"
This message is not really helpful, so I digged deeper into the problem. The "Parser.php" throwing the exception is located in "helmich/typo3-typoscript-parser" package, so I first thought that there was a problem with the TypoScript in the desired extension, but after checking ever line manually, I could not find any error.
It came out, that the extension I wanted to process by TYPO3 rector had a "node_modules" folder, which contained a lot of Typescript (not TypoScript) files. Those files where obviously parsed by the TypoScript parser resulting in the shown error message. After removing (excluding should also work) the "node_modules" folder, everything worked as expected.
If you like rector and/or TYPO3 rector, please consider to support the authors.
