MASM_bug_demo listing

test.lst

Microsoft (R) Macro Assembler Version 14.15.26732.1	    11/03/18 17:47:56
test.asm						     Page 1 - 1


				.386
				.MODEL flat, stdcall
				OPTION casemap: none

 00000000			.CONST
 00000000 2A			  label1  DB  42
 00000001 = 00000001		  size1   =   $-label1

 00000000			.CODE

 00000000			Pos proc cbSubStr:DWORD
					RET
 00000007			Pos endp

 00000007			Start:
					; This doesn't compile
					INVOKE Pos, size1
test.asm(17) : error A2070:invalid instruction operands

					; Expected code gen
 0000000C  6A 01			PUSH byte ptr size1
 0000000E  E8 FFFFFFED			CALL Pos

 00000013  C3				RET

				END Start