copy globals() (#1150)
Fixes #1118. Use a copy of globals() rather than a direct reference.
This did not appear to impact the time of tests
diff --git a/third_party/yapf_third_party/_ylib2to3/pgen2/token.py b/third_party/yapf_third_party/_ylib2to3/pgen2/token.py
index 5d09970..fbcd155 100644
--- a/third_party/yapf_third_party/_ylib2to3/pgen2/token.py
+++ b/third_party/yapf_third_party/_ylib2to3/pgen2/token.py
@@ -69,10 +69,11 @@
NT_OFFSET = 256
# --end constants--
-tok_name = {}
-for _name, _value in list(globals().items()):
- if isinstance(_value, int):
- tok_name[_value] = _name
+tok_name = {
+ _value: _name
+ for _name, _value in globals().copy().items()
+ if isinstance(_value, int)
+}
def ISTERMINAL(x):
