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 03:50:40PM +0200, Siep Kroonenberg wrote:
> 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.

Conversely, removing the private format file and copying it to the
network installation, also solved the problem for Windows - but
created a problem for Linux.

So it appears to be a LaTeX problem and have nothing to do with
networking.

Are LaTeX developers taking note of this?

-- 
Siep Kroonenberg