Bug in the debugger?

 A colleague was testing the new CL enhancements and came across what
seems to be a bug in the debugger.

 Here's the test code:
             PGM        PARM(&QUALOBJ)
             DCL        VAR(&QUALOBJ) TYPE(*CHAR) LEN(20)
             DCL        VAR(&MAINOBJ) TYPE(*CHAR) LEN(20)
             DCL        VAR(&QUAL01) TYPE(*CHAR) STG(*DEFINED) +
                          LEN(10) DEFVAR(&QUALOBJ 1)
             DCL        VAR(&QUAL02) TYPE(*CHAR) STG(*DEFINED) +
                          LEN(10) DEFVAR(&QUALOBJ 11)

             CHGVAR     VAR(&MAINOBJ) VALUE(&QUALOBJ)
             SNDPGMMSG  MSG(&QUAL01) TOPGMQ(*PRV (*PGMBDY))
             SNDPGMMSG  MSG(&QUAL02) TOPGMQ(*PRV (*PGMBDY))

             ENDPGM

 CALL TEST PARM( '1234567890abcdefghij' )

 The messages generated contain the correct info:
1234567890
abcdefghij

 Doing the same CALL, step through via debug.
 Both &QUAL01 and &QUAL02 will show 1234567890 throughout the entire run.

 This happens in both the green screen and WDSC.

 Program is compiled with no optimization.  Is this a debugger bug?

 -mark