[llvm] [llvm-symbolizer] Improve error messages for filter symbolization failure (PR #114649)

[James Henderson via llvm-commits]

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@@ -698,6 +695,24 @@ void MarkupFilter::reportLocation(StringRef::iterator Loc) const {
   errs() << '\n';
 }
 
+void MarkupFilter::symbolizeFailure(const MarkupNode &Node, const Module *Mod,
+                                    Error SymbolizeError) {
+  if (Mod) {
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jh7370 wrote:

In the three call sites you've modified, the `Mod` must always be present, so this feels like an unnecessary check?

https://github.com/llvm/llvm-project/pull/114649