Bug report

Extra minorticks appear at an extended part of colorbar with ticks=LogLocator(numticks=10, subs='all').

Code for reproduction

%matplotlib inline

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.colors import LogNorm
from matplotlib.ticker import LogLocator

v = np.geomspace(1e0, 1e4, num=3 * 4).reshape(3, 4)

fig, axs = plt.subplots(figsize=(6, 2))
pc = axs.pcolormesh(v, norm=LogNorm())
fig.colorbar(pc, extend='both')

fig, axs = plt.subplots(figsize=(6, 2))
pc = axs.pcolormesh(v, norm=LogNorm())
fig.colorbar(pc, extend='both', ticks=LogLocator(numticks=10))

fig, axs = plt.subplots(figsize=(6, 2))
pc = axs.pcolormesh(v, norm=LogNorm())
fig.colorbar(pc, extend='both', ticks=LogLocator(numticks=10, subs='all'))

Actual outcome

Expected outcome

Minor ticks appear only at the body of the colorbar.

Probably this is not a right usage for the subs option, but I just want to show minor ticks, which by default are not shown for a short colorbar.

Matplotlib version

• Operating system:
• Matplotlib version: 3.3.4
• Matplotlib backend: module://ipykernel.pylab.backend_inline
• Python version: 3.7.9
• Jupyter version (if applicable): Jupyterlab 3.0.8
• Other libraries:

All installed by conda install -c conda-forge ...