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-rw-r--r--V8Binding/v8/src/x64/virtual-frame-x64.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/V8Binding/v8/src/x64/virtual-frame-x64.cc b/V8Binding/v8/src/x64/virtual-frame-x64.cc
index 888fdc2..fb911a1 100644
--- a/V8Binding/v8/src/x64/virtual-frame-x64.cc
+++ b/V8Binding/v8/src/x64/virtual-frame-x64.cc
@@ -206,6 +206,7 @@ void VirtualFrame::EmitPush(Handle<Object> value) {
void VirtualFrame::Drop(int count) {
+ ASSERT(count >= 0);
ASSERT(height() >= count);
int num_virtual_elements = (element_count() - 1) - stack_pointer_;