Index: lib/sanitizer_common/sanitizer_win.cc
===================================================================
--- lib/sanitizer_common/sanitizer_win.cc
+++ lib/sanitizer_common/sanitizer_win.cc
@@ -735,6 +735,12 @@
   memset(&stack_frame, 0, sizeof(stack_frame));
   size = 0;
 #if defined(_WIN64)
+  static bool sym_inited = false;
+  if (!sym_inited) {
+    SymCleanup(GetCurrentProcess());
+    SymInitialize(GetCurrentProcess(), NULL, TRUE);
+    sym_inited = true;
+  }
   int machine_type = IMAGE_FILE_MACHINE_AMD64;
   stack_frame.AddrPC.Offset = ctx.Rip;
   stack_frame.AddrFrame.Offset = ctx.Rbp;