bltin_exc[]: EnvironmentError is not a "leaf exception", so set it's
leaf_exc flag to zero otherwise the name leaks memory.
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index b0d0648..7eb0f6a 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2005,7 +2005,7 @@
{"AttributeError", &PyExc_AttributeError, 1},
{"EOFError", &PyExc_EOFError, 1},
{"FloatingPointError", &PyExc_FloatingPointError, 1},
- {"EnvironmentError", &PyExc_EnvironmentError, 1},
+ {"EnvironmentError", &PyExc_EnvironmentError, 0},
{"IOError", &PyExc_IOError, 1},
{"OSError", &PyExc_OSError, 1},
{"ImportError", &PyExc_ImportError, 1},