BUG: Illegal Formal Argument and -Zi Crash Compiler

ID: Q112005

The information in this article applies to:

Microsoft FORTRAN PowerStation for MS-DOS, versions 1.0, 1.0a
Microsoft Fortran Powerstation 32 for Windows NT, version 1.0

SYMPTOMS

Using FORTRAN PowerStation to compile a file that contains a subprogram using a formal argument that has the same name as that subprogram may produce the following errors under Windows NT:

error F2209: (variable_name) : illegal as formal argument
fatal error C1900: Il mismatch between 'P1' version '0' and 'P2'
version '19930414'

These error messages are then followed by a stack overflow exception.

When using FORTRAN PowerStation for MS-DOS, the F2209 error is generated. If compiling from the Visual Workbench, the following errors also occur:

error F2513: (variable_name) : not a variable

error F2530: (variable_name) : symbol class illegal here

error F2040: label on continuation line

error F2037: illegal label field

The F2040 and F2037 errors scroll repeatedly showing negative line numbers, until finally the compiler crashes with a DX1020 general protection (GP) fault error. The F2040 and F2037 errors do not occur if compiled from the MS-DOS command line, but the DX1020 error does.

In all cases the F2209 error is correct.

CAUSE

This error occurs only when using the -Zi compiler option.

RESOLUTION

Correct the error by renaming the formal argument. Then recompile with -Zi.

STATUS

Microsoft has confirmed this to be a problem in FORTRAN PowerStation version 1.0 and 1.0a for MS-DOS, and version 1.0 for Windows NT. Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

The sample below illustrates the problem:

Sample Code


c Compile options required: -Zi
c
        integer function i(f,i)
        integer f
        i=f(i)
        return
        end

Additional query words: 1.00 1.00a Dr. Watson subroutine

Keywords :
Version : :1.0,1.0a
Platform :
Issue type :