https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109358
--- Comment #9 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> --- Created attachment 57365 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57365&action=edit Preliminary patch The attached patch fixes the stream I/O related tabbing. This regression tests fine. There is another side issue I discovered not related to stream I am investigating still. I will also work up a test case stream issue.