QB.EXE May Hang if Array Is Named Twice in One COMMON Block (78894)

SYMPTOMS

If the following program is run in the QuickBasic 4.5 QB.EXE environment or the Microsoft Basic Professional Development System (PDS) version 7.0 QBX.EXE environment, the environment will hang during "Binding":

   DIM a%(10),b%(10),c%(10)
   COMMON SHARED a%(),b%(),c%(),b%()
   END
				

This program should result in the error "Duplicate Definition". However, in QB.EXE and QBX.EXE, it does not. The BC.EXE compiler in both QuickBasic and Basic PDS will correctly signal the "Duplicate Definition" error.

This problem occurs in Microsoft QuickBasic version 4.5 (buglist4.50) for MS-DOS and in Microsoft Basic PDS version 7.0 (buglist7.00) for MS-DOS and MS OS/2. This problem was corrected in QBX.EXE in Microsoft Basic PDS version 7.1 (fixlist7.10).