[Clang] fix range calculation for conditionals with throw expressions

clang/docs/ReleaseNotes.rst

@@ -560,7 +560,8 @@ Bug Fixes to C++ Support
 - Clang incorrectly considered a class with an anonymous union member to not be
   const-default-constructible even if a union member has a default member initializer.
   (#GH95854).
-- Fixed an assertion failure when evaluating an invalid expression in an array initializer (#GH112140)
+- Fixed an assertion failure when evaluating an invalid expression in an array initializer. (#GH112140)
+- Fixed an assertion failure in range calculations for conditional throw expressions. (#GH111854)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^