When a configuration is static and has builtin_testdata defined, it was possible that the "testdata" resource that is generated in testcase.prf was used for a qmlimportscan directly. This generated test data resource is no file though. It's a "qmake struct" that contains files and a base folder so that we should add every file from the "file list" of that struct. It is possible, that the generated resource has a base, but no files. Thus we need two loops or we can end up with a command line that ends with "-qmldir". If qmlimportscanner decided to warn/error out in this case in the future this feature could be broken and the point of breakage might not be obvious. Change-Id: I2111f594f7d5cf40521b8fe9236a8be9e2ed1b07 Reviewed-by: Edward Welbourne <edward.welbourne@qt.io> Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>