importmatplotlib.pyplotaspltfig, (ax1,ax2)=plt.subplots(1,2,True,False)x1= [1,2,3,4,5,6,7,8,9]y1= [x*xforxinx1]ax1.plot(x1,y1)x2=y2=[]ax2.plot(x2,y2)plt.show()

Now ax1.get_xlim() returns erroneous (-0.06, 0.06) because when bounding boxes of two plots are united, infinitely small bounding box of ax2 (Bbox('array([[ inf, inf],\n [-inf, -inf]])')) is considered infinitely large in transforms.BboxBase.union(). E. g. transforms.BboxBase.union([ax1.dataLim, ax2.dataLim]) returns Bbox('array([[-inf, -inf],\n [ inf, inf]])') which is incorrect.

This bug prevents correct display of two plots with shared axis while one of them has empty data.