On Tue, Oct 9, 2012 at 5:04 PM, Richard Trieu <span dir="ltr"><<a href="mailto:rtrieu@google.com" target="_blank">rtrieu@google.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
The following code causes a crash:<div><br></div><div><div>template<typename T> class vector2 {};</div><div>template<typename T> class vector : vector2<T> {};</div><div><br></div><div>template<typename T> void Foo(vector<const T*> V) {}</div>
<div><br></div><div>void test() {</div><div> Foo(vector<int*>());</div><div>}</div></div><div><br></div><div>Once template deduction fails in vector, it tries again with with the base class vector2 and also fails, but with a different status. However, the TemplateDeductionInfo is updated, but the old status is kept. This leads to an assert later when the diagnostic is produced. This patch introduces a temporary TemplateDeductionInfo to capture the information from the base class template deduction, and only overrides the old info if the template deduction is successful.</div>
</blockquote></div><br><div>Oops. And here's the patch.</div>