[trivial] Use proper test cases on `unittest` (#2775)

[etc/vim.git] / src / blib2to3 / pgen2 / parse.py

diff --git a/src/blib2to3/pgen2/parse.py b/src/blib2to3/pgen2/parse.py
index 8fe9667289796bf16d2186b17a81a3b8cf1a6ece..a9dc11f39ce15deedbcb57cbef8d5774c238d4ea 100644 (file)
--- a/src/blib2to3/pgen2/parse.py
+++ b/src/blib2to3/pgen2/parse.py
@@ -54,7 +54,7 @@ def stack_copy(
     stack: List[Tuple[DFAS, int, RawNode]]
 ) -> List[Tuple[DFAS, int, RawNode]]:
     """Nodeless stack copy."""
-    return [(copy.deepcopy(dfa), label, DUMMY_NODE) for dfa, label, _ in stack]
+    return [(dfa, label, DUMMY_NODE) for dfa, label, _ in stack]
 
 
 class Recorder:
@@ -269,6 +269,10 @@ class Parser(object):
                     break
 
                 next_token_type, next_token_value, *_ = proxy.eat(counter)
+                if next_token_type in (tokenize.COMMENT, tokenize.NL):
+                    counter += 1
+                    continue
+
                 if next_token_type == tokenize.OP:
                     next_token_type = grammar.opmap[next_token_value]