ded1bad64a
"line 0" in a DWARF linetable means something that doesn't have associated source. The code for mixed disassembly has a comment indicating that "line 0" should be skipped, but the wrong value was returned. Fix the return value and add a test to check that we don't incorrectly show source lines from the beginning of the file. Reviewed By: jasonmolenda Differential Revision: https://reviews.llvm.org/D112931