igraph:vertex_separators: Crash with empty stacktrace

Detailed Report: https://oss-fuzz.com/testcase?key=4680147175276544 Project: igraph Fuzzing Engine: libFuzzer Fuzz Target: vertexseparators Job Type: libfuzzerubsanigraph Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x000100029b86 Crash State: NULL Sanitizer: undefined UBSAN...