forked from OSchip/llvm-project
Fix a crash in diagnostic printing when a template class type is diff'ed
against itself. PR14489. llvm-svn: 170474
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@ -1125,7 +1125,12 @@ class TemplateDiff {
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TemplateDecl *FromTD, *ToTD;
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Tree.GetNode(FromTD, ToTD);
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assert(Tree.HasChildren() && "Template difference not found in diff tree.");
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if (!Tree.HasChildren()) {
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// If we're dealing with a template specialization with zero
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// arguments, there are no children; special-case this.
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OS << FromTD->getNameAsString() << "<>";
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return;
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}
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Qualifiers FromQual, ToQual;
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Tree.GetNode(FromQual, ToQual);
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@ -800,6 +800,18 @@ namespace PR14342 {
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// CHECK-ELIDE-NOTREE: error: no viable conversion from 'X<[...], 2>' to 'X<[...], 3UL>'
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}
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namespace PR14489 {
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// The important thing here is that the diagnostic diffs a template specialization
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// with no arguments against itself. (We might need a different test if this
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// diagnostic changes).
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template<class ...V>
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struct VariableList {
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void ConnectAllToAll(VariableList<>& params = VariableList<>()) {
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}
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};
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// CHECK-ELIDE-NOTREE: non-const lvalue reference to type 'VariableList<>' cannot bind to a temporary of type 'VariableList<>'
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}
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// CHECK-ELIDE-NOTREE: {{[0-9]*}} errors generated.
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// CHECK-NOELIDE-NOTREE: {{[0-9]*}} errors generated.
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// CHECK-ELIDE-TREE: {{[0-9]*}} errors generated.
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