n case mstrdup failed, avoid free on NULL

1 files changed, 6 insertions, 3 deletions

diff --git a/tr8as.c b/tr8as.c
index e150aeb..36418fa 100644
--- a/tr8as.c
+++ b/tr8as.c
@@ -1667,11 +1667,14 @@ static uint8_t asm(As *as, const char *filename, FILE *in)
     rc = resolve(as);
 
     for (i = 0; i < as->rcnt; i++)
-        free((void *)as->refs[i].loc.filename);
+        if (as->refs[i].loc.filename)
+            free((void *)as->refs[i].loc.filename);
     for (i = 0; i < as->dcnt; i++)
-        free((void *)as->defs[i].loc.filename);
+        if (as->defs[i].loc.filename)
+            free((void *)as->defs[i].loc.filename);
     for (i = 0; i < as->lcnt; i++)
-        free((void *)as->labels[i].loc.filename);
+        if (as->labels[i].loc.filename)
+            free((void *)as->labels[i].loc.filename);
 
     return rc;
 }