Index: lib/asan/asan_suppressions.cc
===================================================================
--- lib/asan/asan_suppressions.cc
+++ lib/asan/asan_suppressions.cc
@@ -18,6 +18,7 @@
 #include "sanitizer_common/sanitizer_placement_new.h"
 #include "sanitizer_common/sanitizer_suppressions.h"
 #include "sanitizer_common/sanitizer_symbolizer.h"
+#include <assert.h>
 
 namespace __asan {
 
@@ -89,6 +90,7 @@
 
     if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) {
       SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
+      assert(frames && "does not point to any symbolized frames");
       for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
         const char *function_name = cur->info.function;
         if (!function_name) {