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forward_reference_errors.asm(6): error: Duplicate label: equ_lab2
forward_reference_errors.asm(14): error: Forward reference
forward_reference_errors.asm(17): warning[fwdref]: forward reference of symbol: IF 0 < normal_label2_fwd
forward_reference_errors.asm(21): error: [STRUCT] Forward reference
forward_reference_errors.asm(25): error: [DUP/REPT] Forward reference
# file opened: forward_reference_errors.asm
 1    0000                      ;; DEFL vs EQU difference
 2    0000              defl_lab2   DEFL    0x1234              ;; DEFL (and alias "=") are like "variables"
 3    0000              defl_lab2   =       0x5678              ;; so modifying them is OK
 4    0000
forward_reference_errors.asm(5): warning: Label has different value in pass 3: previous value 22136 not equal 4660
 5    0000              equ_lab2    EQU     0x1234              ;; EQU is like "const", should be defined only once
forward_reference_errors.asm(6): warning: Label has different value in pass 3: previous value 4660 not equal 22136
 6    0000              equ_lab2    EQU     0x5678              ;; error, different value
 7    0000
 8    0000                      ;; valid forward reference
 9    0000 CD 03 00             call    normal_label
10    0003              normal_label:
11    0003 C9                   ret
12    0004
13    0004                      ;; invalid forward references
14    0004              defl_lab    DEFL    defl_lab_fwd
15    0004              equ_lab     EQU     equ_lab_fwd         ;; !! VALID since v1.13.3 !!
16    0004
17    0004                      IF 0 < normal_label2_fwd
18    0004                          ; <some instruction> - would modify results of pass2 vs pass3
19    0004                      ENDIF
20    0004
21    0004                      STRUCT test_struct, struct_lab_fwd
22    0004 ~            xyz         BYTE
23    0004                      ENDS
24    0004
25    0004                      DUP dup_label_fwd
26    0004                      EDUP
27    0004
28    0004              defl_lab_fwd:
29    0004              equ_lab_fwd:
30    0004              struct_lab_fwd:
31    0004              normal_label2_fwd:
32    0004              dup_label_fwd:
33    0004
34    0004                      IF 0 < normal_label3_fwd    ; fwdref-ok - since v1.15.0 it's possible to suppress the warning
35    0004                          ASSERT 0 < $
36    0004                      ENDIF
37    0004
38    0004                      IF 4 = normal_label3_fwd    ; fwdref-ok - but label reports warning even when IF warning is suppressed
39    0004 ~                        nop
40    0004                      ENDIF
41    0004
forward_reference_errors.asm(42): warning: Label has different value in pass 3: previous value 5 not equal 4
42    0004              normal_label3_fwd:
43    0004
# file closed: forward_reference_errors.asm

Value    Label
------ - -----------------------------------------------------------
0x0004 X defl_lab
0x5678 X defl_lab2
0x0004   defl_lab_fwd
0x0004   dup_label_fwd
0x0004 X equ_lab
0x5678 X equ_lab2
0x0004   equ_lab_fwd
0x0003   normal_label
0x0004   normal_label2_fwd
0x0004   normal_label3_fwd
0x0004   struct_lab_fwd
0x0005 X test_struct
0x0004 X test_struct.xyz