1 files changed, 9 insertions, 6 deletions
diff --git a/base/debug/trace_event_win.cc b/base/debug/trace_event_win.cc
index d5a21f4..686ade3 100644
--- a/base/debug/trace_event_win.cc
+++ b/base/debug/trace_event_win.cc
@@ -78,14 +78,17 @@ void TraceEventETWProvider::TraceEvent(const char* name,
   event.SetField(1, sizeof(id), &id);
   event.SetField(2, extra_len + 1, extra);
 
-  // See whether we're to capture a backtrace.
+  // These variables are declared here so that they are not out of scope when
+  // the event is logged.
+  DWORD depth;
   void* backtrace[32];
+
+  // See whether we're to capture a backtrace.
   if (enable_flags() & CAPTURE_STACK_TRACE) {
-    DWORD hash = 0;
-    DWORD depth = CaptureStackBackTrace(0,
-                                        arraysize(backtrace),
-                                        backtrace,
-                                        &hash);
+    depth = CaptureStackBackTrace(0,
+                                  arraysize(backtrace),
+                                  backtrace,
+                                  NULL);
     event.SetField(3, sizeof(depth), &depth);
     event.SetField(4, sizeof(backtrace[0]) * depth, backtrace);
   }