Merge pull request #26476 from Azoy/fix-tuple-metadata-crash

[Runtime] Fix crash on tuple metadata dump

Author: jckarter

stdlib/public/runtime/Metadata.cpp

@@ -3952,9 +3952,15 @@ void Metadata::dump() const {
   printf("Kind: %s.\n", getStringForMetadataKind(getKind()).data());
   printf("Value Witnesses: %p.\n", getValueWitnesses());
 
-  auto *contextDescriptor = getTypeContextDescriptor();
-  printf("Name: %s.\n", contextDescriptor->Name.get());
-  printf("Type Context Description: %p.\n", contextDescriptor);
+  if (auto *contextDescriptor = getTypeContextDescriptor()) {
+    printf("Name: %s.\n", contextDescriptor->Name.get());
+    printf("Type Context Description: %p.\n", contextDescriptor);
+  }
+
+  if (auto *tuple = dyn_cast<TupleTypeMetadata>(this)) {
+    printf("Labels: %s.\n", tuple->Labels);
+  }
+
   printf("Generic Args: %p.\n", getGenericArgs());
 
 #if SWIFT_OBJC_INTEROP