gas m68k/MRI segfault

[Smith, Gene]

The following file segfaults in gas (binutils 2.13). But when the line
containing OFFSET, marked below, is removed it works ok. This is excerpted
from a larger file. I have seen this in a couple of different files. The
problems seems to be related to the arithmetic, e.g., SEL1030-SEL10, in the
list of DC.W's below and the subsequent OFFSET.

I assemble the file with this command line:
m68k-rtems-as --mri filename

SEL1010  BSR      CLR_STW       
*                       
         BRA      ESEL10                    
*       
SEL1020  NOP 
ENDIF10  EQU      *                       
         BRA.S    ESEL10                 
*                                       
SEL1030  MOVE.W   #DP_INCLR,DP_STATE
*                               
SEL1040  LEA      DP_IN_OK,A0
*
SEL1050  BSR      UPD_STW                   
         BSR      DO_INS                   
         BRA.S    ESEL10                  
*
SEL1060  LEA      DP_IN_OK,A0               
         
SEL10    DC.W     SEL1010-SEL10           
         DC.W     SEL1010-SEL10          
         DC.W     SEL1010-SEL10         
         DC.W     SEL1010-SEL10 
         DC.W     SEL1020-SEL10
         DC.W     SEL1030-SEL10
         DC.W     SEL1040-SEL10
         DC.W     SEL1050-SEL10
         DC.W     SEL1060-SEL10
MX_TRAN  EQU      (*-SEL10)-2
ESEL10   EQU      *             
         RTS      !     
*               
         OFFSET   0                 <--ok if this line gone 
cREGS    REG      D0/A0/A1      
         DS.L     1     
         DS.L     1
         DS.L     1
         END