https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86469
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Jonny Grant from comment #3) > Hello Richard > It's commercial source code that can't be disclosed. > Is there another way to create a test case which has the same issue? a lot > of debug information? You may want to look at https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction which talks about how to reduce a testcase. In particular getting the number of input objects reduced by using -r at link time may help (if the bug reproduces then...). If you manage to reduce to a single input source you can use standard reduction tools like creduce or delta to reduce (and obfuscate) the testcase.