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[lldb] Avoid mangling empty opaque types #10947

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[lldb] Avoid mangling empty opaque types #10947

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7 changes: 7 additions & 0 deletions lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2855,6 +2855,13 @@ TypeSystemSwiftTypeRef::RemangleAsType(swift::Demangle::Demangler &dem,
if (!node)
return {};

// Guard against an empty opaque type. This can happen when demangling an
// OpaqueTypeRef (ex `$sBpD`). An empty opaque will assert when mangled.
if (auto *opaque_type =
swift_demangle::ChildAtPath(node, {Node::Kind::OpaqueType}))
if (!opaque_type->hasChildren())
return {};

using namespace swift::Demangle;
if (node->getKind() != Node::Kind::Global) {
auto global = dem.createNode(Node::Kind::Global);
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