[OpenMP] Fix crash with invalid size expression (llvm#139745)

We weren't correctly handling size expressions with errors before trying
to get the type of the size expression.

No release note needed because support for 'stripe' was added to the
current release.

Fixes llvm#139433

Author: AaronBallman

clang/lib/Sema/SemaOpenMP.cpp

@@ -14551,7 +14551,10 @@ StmtResult SemaOpenMP::ActOnOpenMPStripeDirective(ArrayRef<OMPClause *> Clauses,
 
   const auto *SizesClause =
       OMPExecutableDirective::getSingleClause<OMPSizesClause>(Clauses);
-  if (!SizesClause || llvm::is_contained(SizesClause->getSizesRefs(), nullptr))
+  if (!SizesClause ||
+      llvm::any_of(SizesClause->getSizesRefs(), [](const Expr *SizeExpr) {
+        return !SizeExpr || SizeExpr->containsErrors();
+      }))
     return StmtError();
   unsigned NumLoops = SizesClause->getNumSizes();
 

clang/test/OpenMP/stripe_messages.cpp

@@ -161,3 +161,11 @@ void template_inst() {
   // expected-note@+1 {{in instantiation of function template specialization 'templated_func_type_dependent<int>' requested here}}
   templated_func_type_dependent<int>();
 }
+
+namespace GH139433 {
+void f() {
+#pragma omp stripe sizes(a)    // expected-error {{use of undeclared identifier 'a'}}
+  for (int i = 0; i < 10; i++)
+    ;
+}
+} // namespace GH139433