[llvm] [llvm-debuginfo-analyzer] Fix a couple of unhandled DWARF situations leading to a crash (PR #137221)

[Carlos Alberto Enciso via llvm-commits]

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@@ -330,13 +330,16 @@ void LVScope::addMissingElements(LVScope *Reference) {
       Symbol->setIsOptimized();
       Symbol->setReference(Reference);
 
-      // The symbol can be a constant, parameter or variable.
+      // The symbol can be a constant, parameter, variable or unspecified
+      // parameters (i.e. `...`).
       if (Reference->getIsConstant())
         Symbol->setIsConstant();
       else if (Reference->getIsParameter())
         Symbol->setIsParameter();
       else if (Reference->getIsVariable())
         Symbol->setIsVariable();
+      else if (Reference->getIsUnspecified())
+        Symbol->setIsUnspecified();
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CarlosAlbertoEnciso wrote:

Good finding.

https://github.com/llvm/llvm-project/pull/137221