[clang] [clang][bytecode] Fix unknown size arrays crash in clang bytecode (PR #160015)

[Timm Baeder via cfe-commits]

================
@@ -245,6 +245,11 @@ bool Context::evaluateStrlen(State &Parent, const Expr *E, 
uint64_t &Result) {
     if (!FieldDesc->isPrimitiveArray())
       return false;
 
+    // Handle unknown size arrays - we can't determine the length at compile 
time
+    if (Ptr.isUnknownSizeArray()) {
+      return false;
+    }
----------------
tbaederr wrote:

This should be `isDummy()` IIRC.

https://github.com/llvm/llvm-project/pull/160015
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