https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99886
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by David Malcolm <dmalc...@gcc.gnu.org>: https://gcc.gnu.org/g:69b66ff02353a87585329bb3cf4ac20d6dee1b16 commit r11-7987-g69b66ff02353a87585329bb3cf4ac20d6dee1b16 Author: David Malcolm <dmalc...@redhat.com> Date: Mon Apr 5 10:48:01 2021 -0400 analyzer: fix apparent hang with -fanalyzer-verbosity=0 [PR analyzer/99886] The analyzer appeared to enter an infinite loop on malloc-1.c when -fanalyzer-verbosity=0 was used. In fact, it was slowly counting from 0 to 0xffffffff. Root cause is looping up to effectively ((unsigned)0) - 1 in diagnostic_manager::consolidate_conditions when there are no events in the path. Fixed by the following, which uses signed integers when subtracting from path->num_events () when simplifying checker_paths. gcc/analyzer/ChangeLog: PR analyzer/99886 * diagnostic-manager.cc (diagnostic_manager::prune_interproc_events): Use signed integers when subtracting one from path->num_events (). (diagnostic_manager::consolidate_conditions): Likewise. Convert next_idx to a signed int. gcc/testsuite/ChangeLog: PR analyzer/99886 * gcc.dg/analyzer/pr99886.c: New test.
