A couple of other "stack overflow" vs. "has_pending_exception()" issues fixed.

src/runtime/runtime-strings.cc

Index: src/runtime/runtime-strings.cc
diff --git a/src/runtime/runtime-strings.cc b/src/runtime/runtime-strings.cc
index 5704807b82b60a62e0887efce7423d7e4e124ec6..49ce1a72575d28e420dabe5ba321f926e30e2793 100644
--- a/src/runtime/runtime-strings.cc
+++ b/src/runtime/runtime-strings.cc
@@ -121,11 +121,13 @@ RUNTIME_FUNCTION(Runtime_StringReplaceOneCharWithString) {
   if (isolate->has_pending_exception()) return isolate->heap()->exception();
 
   subject = String::Flatten(subject);
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result,
-      StringReplaceOneCharWithString(isolate, subject, search, replace, &found,
-                                     kRecursionLimit));
-  return *result;
+  if (StringReplaceOneCharWithString(isolate, subject, search, replace, &found,
+                                     kRecursionLimit).ToHandle(&result)) {
+    return *result;
+  }
+  if (isolate->has_pending_exception()) return isolate->heap()->exception();
+  // In case of empty handle and no pending exception we have stack overflow.
+  return isolate->StackOverflow();
 }