In ticker.py / AutoMinorLocator class / call function, there is a code mistake that results in a division by zero:
if len(majorlocs) > 0 :
should be replaced by :
if len(majorlocs) > 1 :

Otherwise this can happen :

majorstep = 0
minorstep = majorstep / ndivs
tmin = ((vmin - t0) // minorstep + 1) * minorstep

BOUM !