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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/56659] Segfault due to missing libcpp error handler for
 "gfortran -cpp"
Date: Wed, 06 Oct 2021 21:23:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D56659

--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Paul from comment #5)
> Just tried all versions of gfortran available up to 10.2.0: the very same
> 'internal compiler error' is still reported using the initial reproducer.=
=20

Can you share the initial reproducer? The email link to gmane no longer wor=
ks
and what is written in the the original description and in the other email
lacks the details. It only has:

Test case:
* mkdir -p foo/bar
* chmod 000 foo
* gfortran -cpp some_file.F90

But that obviously does not use 'foo/bar' at all.

I have no idea what's in 'some_file.F90'; the most straight-forward input w=
ould
be:
  echo '#include "foo/bar/file.f90"' > some_file.F90
but when I try this, GCC 7, 8, 9, 10 of Ubuntu and the current development
version all show the same:
  some_file.F90:2:2:
  Fatal Error: foo/bar/file.f90: Permission denied

(The off-by-one line number issue is PR 100904.)

I assume that your file contains something different - but what? Can you
enlighten me?

 * * *

A couple of fixes were done in the development branch (to be released as GC=
C 12
around April), cf. PR 55534.=