User:Hanya/Iif Problem

Issue: https://issues.apache.org/ooo/show_bug.cgi?id=63614

Error code 87302 is produced when some code is modified contains Iif runtime function.

• • Disassembled Original

Sub Main
IIf(true, 1.0, "")
End Sub

Position Op Op1      Op2        OpStr   
-----------------------------------------
00000000                            Lbl00000000:
00000000 45 00000000          	JUMP	Lbl0000  // Label
; Sub Main
00000005                            Main:
00000005 87 00000003 00000000 	STMNT	3,0 (For-Level: 0)
; IIf(true, 1.0, "")
0000000E 87 00000004 00000000 	STMNT	4,0 (For-Level: 0)
00000017 18                   	ARGC	     // new argv
00000018 80 00000002 0000000C 	RTL	true	; Variant
00000021 19                   	ARGV	
00000022 40 00000004          	NUMBER	"1"
00000027 19                   	ARGV	
00000028 41 00000005          	STRING	""
0000002D 19                   	ARGV	
0000002E 80 00008003 00000000 	RTL	IIf	; Empty, Args
00000037 1C                   	GET	
; End Sub
00000038 87 00000005 00000000 	STMNT	5,0 (For-Level: 0)
00000041 2B                   	LEAVE	

• • Disassembled with Problem

Second argument for IIf function is changed from 1.0 to "". Execute the code after the change -> strange error.

Sub Main
IIf(true, "", "")
End Sub

00000000                            Lbl00000000:
00000000 45 00000000          	JUMP	Lbl0000
; Sub Main
00000005                            Main:
00000005 87 00000003 00000000 	STMNT	3,0 (For-Level: 0)
; IIf(true, "", "")
0000000E 87 00000004 00000000 	STMNT	4,0 (For-Level: 0)
00000017 18                   	ARGC	
00000018 80 00000002 0000000C 	RTL	true	; Variant
00000021 19                   	ARGV	
00000022 41 00000004          	STRING	""
00000027 19                   	ARGV	
00000028 41 00000004          	STRING	""
0000002D 19                   	ARGV	
0000002E 80 00008003 00000002 	RTL	IIf	; Integer, Args
00000037 1C                   	GET	
; End Sub
00000038 87 00000005 00000000 	STMNT	5,0 (For-Level: 0)
00000041 2B                   	LEAVE	

• • Disassembled without Problem after Restarting

After the modification and error mentioned above, restart the office. And then execute the code, no error.

00000000                            Lbl00000000:
00000000 45 00000000          	JUMP	Lbl0000
; Sub Main
00000005                            Main:
00000005 87 00000003 00000000 	STMNT	3,0 (For-Level: 0)
; IIf(true, "", "")
0000000E 87 00000004 00000000 	STMNT	4,0 (For-Level: 0)
00000017 18                   	ARGC	
00000018 80 00000002 0000000C 	RTL	true	; Variant
00000021 19                   	ARGV	
00000022 41 00000004          	STRING	""
00000027 19                   	ARGV	
00000028 41 00000004          	STRING	""
0000002D 19                   	ARGV	
0000002E 80 00008003 00000000 	RTL	IIf	; Empty, Args
00000037 1C                   	GET	
; End Sub
00000038 87 00000005 00000000 	STMNT	5,0 (For-Level: 0)
00000041 2B                   	LEAVE	

• • Differences

With the same code, different operation codes are generated for IIf function.

// with problem
0000002E 80 00008003 00000002 	RTL	IIf	; Integer, Args
// restarted
0000002E 80 00008003 00000000 	RTL	IIf	; Empty, Args

The error code 87302 is set in SbxValue::SetType (t is not equal to aData.eType) method. Therefore the problem is caused by the wrong compilation when the code is modified.