hgview #10146740 changelogcolumns config option is crashing hgview [open]

In my hgrc I have

[hgview]
changelogcolumns= ID, Branch, Log, Author, Date, Tags

when I start hgview I get:

File "/usr/lib/python3/dist-packages/hgviewlib/config.py", line 224, in getChangelogColumns
  return [col.strip() for col in cols.split(',') if col.strip()]
TypeError: a bytes-like object is required, not 'str'

versions are:

ii  hgview                                    1.13.0-1~bpo10+1                     all          mercurial interactive history viewer (Qt4 interface)
ii  hgview-common                             1.13.0-1~bpo10+1                     all          mercurial interactive history viewer (common files)
ii  mercurial                                 5.2.1~logilab1-1~bpo10+1             amd64        fast, easy to use, distributed revision control tool.
ii  mercurial-evolve                          9.2.1+58-a3f692b~logilab1-1~bpo10+1  all          evolve extension for Mercurial
priorityimportant
typebug
done in<not specified>
closed by<not specified>