Maestro 2.19 ZeroPain.

Meastro 2.19 in RC3 ZeroPains everytime something is entered onto the staves. Maestro 2.18 is OK

Time: Sun Jul  9 12:41:06 2023
Location: Offset 0000493c in module BASIC
Current Wimp task: Maestro
Last app to start: BASIC -quit "SCSI::SSD120.$.Work.Proj.New-t.Maestro.!Maestro.!RunImage"

R0  = 00000004 R1  = 00000000 R2  = 00000004 R3  = 00000025
R4  = 0000e030 R5  = 25003f00 R6  = ffffffff R7  = 00031ed0
R8  = 00008700 R9  = 00000004 R10 = 00000034 R11 = 0000e030
R12 = 0000e02c R13 = 00050e50 R14 = fc1be258 R15 = fc1bf2dc
DFAR = 00000004  Mode USR32  Flags nZCv if   PSR = 60000110

fc1bf294 : 11a02182 : MOVNE   R2,R2,LSL #3
fc1bf298 : 11a00230 : MOVNE   R0,R0,LSR R2
fc1bf29c : 12623020 : RSBNE   R3,R2,#&20         ; =" "
fc1bf2a0 : 11800311 : ORRNE   R0,R0,R1,LSL R3
fc1bf2a4 : 11a01231 : MOVNE   R1,R1,LSR R2
fc1bf2a8 : e21110ff : ANDS    R1,R1,#&FF         ; ="ˇ"
fc1bf2ac : 03300000 : TEQEQ   R0,#0
fc1bf2b0 : e2003102 : AND     R3,R0,#&80000000
fc1bf2b4 : 13800102 : ORRNE   R0,R0,#&80000000
fc1bf2b8 : e3b09102 : MOVS    R9,#&80000000
fc1bf2bc : e1a0f00e : MOV     PC,R14
fc1bf2c0 : e5d00000 : LDRB    R0,[R0,#0]
fc1bf2c4 : e3b09101 : MOVS    R9,#&40000000
fc1bf2c8 : e1a0f00e : MOV     PC,R14
fc1bf2cc : e2101003 : ANDS    R1,R0,#3
fc1bf2d0 : e3c02003 : BIC     R2,R0,#3
fc1bf2d4 * 05900000 * LDREQ   R0,[R0,#0]
fc1bf2d8 : 18920005 : LDMNEIA R2,{R0,R2}
fc1bf2dc : 11a01181 : MOVNE   R1,R1,LSL #3
fc1bf2e0 : 11a00130 : MOVNE   R0,R0,LSR R1
fc1bf2e4 : 12611020 : RSBNE   R1,R1,#&20         ; =" "
fc1bf2e8 : 11800112 : ORRNE   R0,R0,R2,LSL R1
fc1bf2ec : e3b09101 : MOVS    R9,#&40000000
fc1bf2f0 : e1a0f00e : MOV     PC,R14
fc1bf2f4 : 0a00000e : BEQ     &FC1BF334
fc1bf2f8 : e3590c01 : CMP     R9,#&0100          ; =256
fc1bf2fc : 2a003243 : BCS     &FC1CBC10
fc1bf300 : e2482c06 : SUB     R2,R8,#&0600       ; =1536
fc1bf304 : e2823c01 : ADD     R3,R2,#&0100       ; =256
fc1bf308 : e2833001 : ADD     R3,R3,#1
fc1bf30c : e4d01001 : LDRB    R1,[R0],#1
fc1bf310 : e4c21001 : STRB    R1,[R2],#1

R11 = 0000e030 R12 = 0000e02c

So handy having a dump of the current line start and token, that narrows things down considerably. It seems to be FindBar being called which in turn tries to look up from GPn%() which hasn’t yet been set. Maybe this modified version is a bit safer?

So handy having a dump of the current line start and token

Damn, that’s some deep magic right there…

Maybe this modified version is a bit safer?

It is, no further ZeroPain has been seen.

no further ZeroPain has been seen

Thanks for confirming – now in the queue, I slightly refactored it so my variable name made sense but it should be equivalent!