The no-label-macro isn't properly detected and results in a Segmentation Fault

[electrickery]

While trying to debug issue #22 I found that the "no label" case results in a Segmentation Fault:

$ ./a09 test.asm

A09 Assembler V1.62
Segmentation fault
$

test.asm:

; no label MACRO

    MACRO
        NOP
        ENDM
        
        ORG     $0
        TEST
        END

The code is recently (2025-06-02) pulled from the repo. System is MX-23.6_x64 Libretto October 15, 2023.

[electrickery]

This hack seems to fix the issue:

index 70d20fc..52c48b6 100644
--- a/a09.c
+++ b/a09.c
@@ -7224,8 +7224,10 @@ switch (co)
     curline->flg |= LINCAT_INVISIBLE;
     break;
   case PSEUDO_MACRO :                   /* label MACRO                       */
-    if (!lp)                            /* a macro NEEDS a label!            */
+    if (!lp) {                           /* a macro NEEDS a label!            */
       error |= ERR_LABEL_MISSING;
+      break;
+    }
     if (lp->cat == SYMCAT_EMPTY)
       {
       if (nMacros < MAXMACROS)          /* if space for another macro defin. */

Note I am not an experienced programmer, just an ex-tester ;-).

Fred Jan