[PATCH] MCStreamer for x86_64: W64UnwindInfos must be cleared in reset()

[Kai Nacke]

Hi!

Just noticed the following:
MCStreamer::reset() deletes all created W64UnwindInfos but does not 
clear the vector. If you ever put something into W64UnwindInfos and 
class reset then you got a double-free in the destructor.

Simple fix is to call clear() in reset(). No functional change intended.

Please review. Thanks.

Regards
Kai
-------------- next part --------------
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 4839c34..8f1895e 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -35,6 +35,7 @@ MCStreamer::~MCStreamer() {
 void MCStreamer::reset() {
   for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
     delete W64UnwindInfos[i];
+  W64UnwindInfos.clear();
   EmitEHFrame = true;
   EmitDebugFrame = false;
   CurrentW64UnwindInfo = 0;