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From: "juno.krahn at nih dot gov" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/55345] New: ICE with  abstract interface type with use-renamed local names
Date: Thu, 15 Nov 2012 18:07:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55345

             Bug #: 55345
           Summary: ICE with  abstract interface type with use-renamed
                    local names
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: juno.krahn@nih.gov


If an abstract interface type is renamed in the USE statement, and one of those
names includes the original name, an ICE can occur.

Example code (bug.f90):
----------------------------------
module mod1
  abstract interface
    subroutine func_t()
    end subroutine func_t
  end interface
end module mod1
module bug
  use mod1, func_t=>func_t, func1_t=>func_t
end module bug
----------------------------------

Result:
$ gfortran -c bug2.f90 
bug.f90:8:0: internal compiler error: in gfc_trans_use_stmts, at
fortran/trans-decl.c:3886
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.


If the two USE statements are switched, no ICE occurs. It also succeeds if the
rename statements are within an ONLY list.