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Q149147: BUG: Equivalence and Non-Common Block Variable Cause ASSERT

Article: Q149147
Product(s): Microsoft Fortran Compiler
Version(s): 4.0
Operating System(s): 
Keyword(s): kbFortranPS kbLangFortrankbbuglist
Last Modified: 06-NOV-1999

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The information in this article applies to:

- Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0 
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SYMPTOMS
========

Assigning a value to an equivalenced variable not part of a common block in an
internal subroutine when the associated equivalenced variable is part of a
common block causes the following compile-time ASSERT failure message to be
generated:

  Assertion failed: base->key.be_key != 0, file err_genex.c, line 2828
  abnormal program termination

RESOLUTION
==========

Do one of the following to work around the problem:

- Redeclare the common block and equivalence in the internal procedure.

-or-

- Do not assign a value to the non-common block equivalenced variable.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

Sample Code to Illustrate Problem
---------------------------------

  ! Compile options needed: none

        program test
            real r
            integer i
            common /theblock/ i
            equivalence (r,i)
            call b
            print *, r
        contains
            subroutine b
  ! uncomment the next 4 lines for work-around
  !              real r
  !              integer i
  !              common /theblock/ i
  !              equivalence (r,i)
                r = 1.0          ! This line causes an ASSERT failure
            end subroutine b
        end program test

Additional query words: 4.00

======================================================================
Keywords          : kbFortranPS kbLangFortran kbbuglist
Technology        : kbAudDeveloper kbPTProdChange kbFortranSearch kbFORTRANPower400NT
Version           : :4.0

=============================================================================

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