Preserve control-flow exceptions when joining pointer parts

jsonpointer.py

@@ -307,7 +307,7 @@ def join(self, suffix):
             suffix_parts = suffix
         try:
             return self.__class__.from_parts(chain(self.parts, suffix_parts))
-        except:  # noqa E722
+        except Exception:
             raise JsonPointerException("Invalid suffix")
 
     def __truediv__(self, suffix):

tests.py

@@ -196,6 +196,19 @@ def test_join_magic(self):
         ptr12e = self.ptr1 / ["a", "b"]
         self.assertEqual(ptr12e.path, "/a/b/c/a/b")
 
+    def test_join_preserves_control_flow_exceptions(self):
+        for exception_type in (KeyboardInterrupt, SystemExit, GeneratorExit):
+            with self.subTest(exception_type=exception_type):
+                error = exception_type()
+
+                def parts():
+                    yield 'valid'
+                    raise error
+
+                with self.assertRaises(exception_type) as caught:
+                    self.ptr1.join(parts())
+                self.assertIs(caught.exception, error)
+
     def test_join_subclass(self):
         class Pointer(JsonPointer):
             pass