8223518: Unexpected exception in jjs

Reviewed-by: sundar, mschoene, rhalade, jlaskey

src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/JdkRegExp.java

 /*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -82,6 +82,8 @@ public class JdkRegExp extends RegExp {
             }
         } catch (final PatternSyntaxException e2) {
             throwParserException("syntax", e2.getMessage());
+        } catch (StackOverflowError e3) {
+            throw new RuntimeException(e3);
         }
     }
 

src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java

 /*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -82,6 +82,8 @@ public class JoniRegExp extends RegExp {
             }
         } catch (final PatternSyntaxException | JOniException e2) {
             throwParserException("syntax", e2.getMessage());
+        } catch (StackOverflowError e3) {
+            throw new RuntimeException(e3);
         }
     }