If we don't have a valid Symbol to get a line number from, or if the symbol.lineNum is -1, print a shorter message containing only the file path. Printing: '/path/to/file:-1:1' isn't useful (and looks wrong). Change error/defaultErrorMsg/warning/note() to delegate to one central method, so that they all behave the same; e.g. previously warning() and note(), guarded against printing "-1" for the line number, whereas error() didn't. This also makes it possible to use error() for reporting other issues (e.g. the size of generator.strings list exceeding INT_MAX, which will happen in a later commit). Pick-to: 6.6 Change-Id: Iddc96e08315fae415be6a84928f845d7bceb4c5f Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>