diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index 3bd355bdc663..0285ec6bdaed 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -2394,7 +2394,8 @@ def bar(self, x, height, width=0.8, bottom=None, *, align="center",
# checking and processing will be left to the errorbar method.
xerr = kwargs.pop('xerr', None)
yerr = kwargs.pop('yerr', None)
- error_kw = kwargs.pop('error_kw', {})
+ error_kw = kwargs.pop('error_kw', None)
+ error_kw = {} if error_kw is None else error_kw.copy()
ezorder = error_kw.pop('zorder', None)
if ezorder is None:
ezorder = kwargs.get('zorder', None)
@@ -2550,9 +2551,8 @@ def bar(self, x, height, width=0.8, bottom=None, *, align="center",
error_kw.setdefault("label", '_nolegend_')
- errorbar = self.errorbar(ex, ey,
- yerr=yerr, xerr=xerr,
- fmt='none', **error_kw)
+ errorbar = self.errorbar(ex, ey, yerr=yerr, xerr=xerr, fmt='none',
+ **error_kw)
else:
errorbar = None
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