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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/98426] find_symbol in module.c traverses O(N) part of a
 search tree
Date: Wed, 24 Apr 2024 02:59:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98426

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-04-24
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #7 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
With the proposed patch, the following test case fails.


! { dg-do compile }
! { dg-options "-fsecond-underscore" }
! PR fortran/95689 - ICE in check_sym_interfaces, at fortran/interface.c:20=
15

module m2345678901234567890123456789012345678901234567890123456789_123
  type t2345678901234567890123456789012345678901234567890123456789_123
   end type
   interface
      module subroutine
s2345678901234567890123456789012345678901234567890123456789_123 &=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20
       (x2345678901234567890123456789012345678901234567890123456789_123)
      end
   end interface
end
submodule(m2345678901234567890123456789012345678901234567890123456789_123) &
          t2345678901234567890123456789012345678901234567890123456789_123
end

$ gfc -c -fsecond-underscore pr95689.f90=20
pr95689.f90:14:74:

   14 |
submodule(m2345678901234567890123456789012345678901234567890123456789_123) &
      |=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
 1
Error: Name =E2=80=98t23456789012345678901234567890123456789012345678901234=
56789_123=E2=80=99
at (1) is an ambiguous reference to
=E2=80=98m2345678901234567890123456789012345678901234567890123456789_123.t2=
345678901234567890123456789012345678901234567890123456789_123=E2=80=99
from current program unit=