throw python error on non-string arg in ord

Author: tomasstupka

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinFunctions.java

@@ -1572,6 +1572,7 @@ protected static NextNode create() {
     // ord(c)
     @Builtin(name = ORD, minNumOfPositionalArgs = 1)
     @GenerateNodeFactory
+    @ImportStatic(PGuards.class)
     public abstract static class OrdNode extends PythonBuiltinNode {
 
         @Specialization
@@ -1606,6 +1607,11 @@ public long ord(VirtualFrame frame, PBytesLike chr,
             }
             return castNode.execute(getItemNode.execute(frame, chr.getSequenceStorage(), 0));
         }
+
+        @Specialization(guards = {"!isString(obj)", "!isBytes(obj)"})
+        public Object ord(@SuppressWarnings("unused") Object obj) {
+            throw raise(TypeError, ErrorMessages.S_EXPECTED_STRING_OF_LEN_BUT_P, "ord()", "1", "obj");
+        }
     }
 
     // print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/ErrorMessages.java

@@ -235,6 +235,7 @@ public abstract class ErrorMessages {
     public static final String EXPECTED_S_NOT_P = "expected %s, not %p";
     public static final String EXPECTED_S_P_FOUND = "expected %s, %p found";
     public static final String EXPECTED_STR_BYTE_OSPATHLIKE_OBJ = "expected str, bytes or os.PathLike object, not %p";
+    public static final String S_EXPECTED_STRING_OF_LEN_BUT_P = "%s expected string of length %s, but %p found";
     public static final String EXPECTED_UNICODE_CHAR_NOT_P = "expected a unicode character, not %p";
     public static final String EXPONENT_TOO_LARGE = "exponent too large";
     public static final String FACTORIAL_NOT_DEFINED_FOR_NEGATIVE = "factorial() not defined for negative values";