Format file differences (was: Re: pdflatex does not work on win after todays update but does on linux)

[Siep Kroonenberg]

On Mon, Jun 14, 2021 at 12:24:05PM +0200, Siep Kroonenberg wrote:
> On Sun, Jun 13, 2021 at 05:17:43PM +0200, Andreas Hirsch wrote:
> > Hi,
> > 
> > Siep Kroonenberg schrieb am 13.06.2021 um 11:10:
> > > On Sun, Jun 13, 2021 at 10:59:30AM +0200, Andreas Hirsch wrote:
> > 
> 
> It looks like it crashes when it loads the format file. Try
> 
> fmtutil-user --byfmt pdflatex
> 
> This worked with me, but of course this is not really solution: a
> user-generated format file can shadow a more up-to-date and
> incompatible system format file. And I double whether it would work
> if the user profile were on a network drive.

The system- and user format files are not identical, and if I try
under Linux to compile a latex file with a windows-generated
pdflatex.fmt, then this ends with

x$ pdflatex mathtest
This is pdfTeX, Version 3.141592653-2.6-1.40.22 (TeX Live 2021) (preloaded format=pdflatex)
 restricted \write18 enabled.
pdflatex: fatal: Could not undump 1095041024 1-byte item(s) from /extra/tlsvn/Master/texmf-var/web2c/pdftex/pdflatex.fmt.

-- 
Siep Kroonenberg