In preview-dvisvgm-start:
preview-dvisvgm.el:140:26: Warning: reference to free variable
‘text-scale-mode’
preview-dvisvgm.el:141:30: Warning: reference to free variable
‘text-scale-mode-step’
preview-dvisvgm.el:141:51: Warning: reference to free variable
‘text-scale-mode-amount’
In end of data:
preview-dvisvgm.el:74:2: Warning: the function ‘pushnew’ is not known to be
defined.