Problem Passing Array Element to SUB Compiled with No /Debug (32641)

This article was previously published under Q32641

SYMPTOMS

The code sample below runs correctly when compiled with the debug option turned off (in either the QuickBasic environment or in an .EXE file). The program passes an integer variable i and an array element number i to a non-STATIC subprogram.

However, the program gives incorrect results at run time when compiled with BC /D or with debug selected from the Make EXE File command in the Run menu in QuickBasic.

STATUS

Microsoft has confirmed this to be a bug in QuickBasic Versions 4.00, 4.00b, and 4.50, and in the Microsoft Basic Compiler Versions 6.00 and 6.00b for MS-DOS and MS OS/2 (buglist6.00, buglist6.00b). This problem has been corrected in the Microsoft Basic Compiler Version 7.00 (fixlist7.00).

MORE INFORMATION

The equivalent code works correctly in QuickBasic Version 3.00 with or without the /D (debug) compiler option.

The following code example demonstrates the problem:

DECLARE SUB test (i AS INTEGER, j AS INTEGER)
DIM a(2) AS INTEGER
DIM i AS INTEGER
a(1) = 1
a(2) = 2
i = 1
CALL test(i, a(i))
PRINT i, a(1), a(2)
END

SUB test (i AS INTEGER, j AS INTEGER)
i = 2
END SUB

Modification Type:	Minor	Last Reviewed:	1/8/2003
Keywords:	KB32641