Raise a ValueError when trying to init a LogScale with an invalid base

timhoffm · timhoffm · commit 5b10ba81a739 · 2018-01-30T00:09:01.000+01:00
diff --git a/lib/matplotlib/scale.py b/lib/matplotlib/scale.py
@@ -253,6 +253,8 @@ def __init__(self, axis, **kwargs):
 
         if nonpos not in ['mask', 'clip']:
             raise ValueError("nonposx, nonposy kwarg must be 'mask' or 'clip'")
+        if base <= 0 or base == 1:
+            raise ValueError('The log base cannot be <= 0 or == 1.')
 
         if base == 10.0:
             self._transform = self.Log10Transform(nonpos)
