texlive pretest: updmap under Windows in an auxtree doesn't work

[Keks Dose]

Hi!

texlive 2019 pretest, Windows 8.1.

I added an auxtree.

==================

C:\Windows\system32>tlmgr conf auxtrees show
List of auxiliary texmf trees:
  C:/Users/aw/TEXMF-TREES/libertinetree

==================

Auxtree contains the old libertine-legacy package.

Now, I'd like to add the map file, path:

C:/Users/aw/TEXMF-TREES/libertinetree/fonts/map/dvips/libertine-legacy/libertine.map

Doesn't work:

==================

Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. Alle Rechte vorbehalten.

C:\Windows\system32>updmap-sys --enable Map="C:\Users\aw\TEXMF-TREES\libertinetr
ee\fonts\map\dvips\libertine-legacy\libertine.map"
updmap will read the following updmap.cfg files (in precedence order):
  c:/texlive/2019/texmf-config/web2c/updmap.cfg
  c:/texlive/2019/texmf-dist/web2c/updmap.cfg
updmap may write changes to the following updmap.cfg file:
  c:/texlive/2019/texmf-config/web2c/updmap.cfg
dvips output dir: "c:/texlive/2019/texmf-var/fonts/map/dvips/updmap"
pdftex output dir: "c:/texlive/2019/texmf-var/fonts/map/pdftex/updmap"
dvipdfmx output dir: "c:/texlive/2019/texmf-var/fonts/map/dvipdfmx/updmap"
Unrecognized escape \U passed through in regex; marked by <-- HERE in m//C:\U <-
- HERE sers\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \T passed through in regex; marked by <-- HERE in m//C:\User
s\aw\T <-- HERE EXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//C:\User
s\aw\TEXMF-TREES\l <-- HERE ibertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \m passed through in regex; marked by <-- HERE in m//C:\User
s\aw\TEXMF-TREES\libertinetree\fonts\m <-- HERE ap\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//C:\User
s\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\l <-- HERE ibertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//C:\User
s\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\l <-- HERE ibert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \U passed through in regex; marked by <-- HERE in m//c:\U <-
- HERE sers\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \T passed through in regex; marked by <-- HERE in m//c:\User
s\aw\T <-- HERE EXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//c:\User
s\aw\TEXMF-TREES\l <-- HERE ibertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \m passed through in regex; marked by <-- HERE in m//c:\User
s\aw\TEXMF-TREES\libertinetree\fonts\m <-- HERE ap\dvips\libertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//c:\User
s\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\l <-- HERE ibertine-legacy\libert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
Unrecognized escape \l passed through in regex; marked by <-- HERE in m//c:\User
s\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\l <-- HERE ibert
ine.map(\.map)?$/ at c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl line 2
078.
updmap [ERROR]: The following map file(s) couldn't be found:
updmap [ERROR]:         C:\Users\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\li
bertine-legacy\libertine.map (in c:/texlive/2019/texmf-config/web2c/updmap.cfg)
updmap [ERROR]:         c:\Users\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\li
bertine-legacy\libertine.map (in c:/texlive/2019/texmf-config/web2c/updmap.cfg)
updmap [ERROR]: Did you run mktexlsr?

        You can disable non-existent map entries using the option
          --syncwithtrees.

C:\texlive\2019\bin\win32\runscript.tlu:902: command failed with exit code 1:
perl.exe c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl  --sys --enable Ma
p="C:\Users\aw\TEXMF-TREES\libertinetree\fonts\map\dvips\libertine-legacy\libert
ine.map"

===============================

If I change directory to be in C:/Users/aw/TEXMF-TREES/libertinetree/fonts/map/dvips/libertine-legacy/
I get the same error after "updmap-sys --enable Map=libertine.map"

And if I swap the "\" in the path for a "/", I get a different error:

==============================

C:\Windows\system32>updmap-sys --enable Map="C:/Users/aw/TEXMF-TREES/libertinetr
ee/fonts/map/dvips/libertine-legacy/libertine.map"
updmap will read the following updmap.cfg files (in precedence order):
  c:/texlive/2019/texmf-config/web2c/updmap.cfg
  c:/texlive/2019/texmf-dist/web2c/updmap.cfg
updmap may write changes to the following updmap.cfg file:
  c:/texlive/2019/texmf-config/web2c/updmap.cfg
updmap: map names cannot contain /: C:/Users/aw/TEXMF-TREES/libertinetree/fonts/
map/dvips/libertine-legacy/libertine.map
C:\texlive\2019\bin\win32\runscript.tlu:902: command failed with exit code 255:
perl.exe c:\texlive\2019\texmf-dist\scripts\texlive\updmap.pl  --sys --enable Ma
p="C:/Users/aw/TEXMF-TREES/libertinetree/fonts/map/dvips/libertine-legacy/libert
ine.map"

=============================

How can I enable a map file in an auxiliary tree?

Regards,

Alexander