Update default value for unknown diagnostic IDs

fwcd · fwcd · commit 204827c6abef · 2021-05-08T16:04:56.000+02:00
diff --git a/lib/AST/DiagnosticEngine.cpp b/lib/AST/DiagnosticEngine.cpp
@@ -113,7 +113,7 @@ static constexpr const char *const debugDiagnosticStrings[] = {
 static constexpr const char *const diagnosticIDStrings[] = {
 #define DIAG(KIND, ID, Options, Text, Signature) #ID,
 #include "swift/AST/DiagnosticsAll.def"
-    "",
+    "<not a diagnostic>",
 };
 
 static constexpr const char *const fixItStrings[] = {
