34-fyi-un-segv.patch

[Akim Demaille]

I must say I don't understand why this causes a SEGV.  Is it related
to the sizeof things?

Index: ChangeLog
from  Akim Demaille  <address@hidden>

        * m4/symtab.c (m4_symbol_insert): Don't use `foo () || bar ()'
        with pointers.

Index: m4/symtab.c
--- m4/symtab.c Tue, 04 Sep 2001 11:03:34 +0200 akim
+++ m4/symtab.c Tue, 04 Sep 2001 11:03:49 +0200 akim
@@ -210,7 +210,11 @@
 m4_symbol *
 m4_symbol_insert (const char *name)
 {
-  return (m4_symbol *) (m4_symbol_lookup (name) || m4_symbol_pushdef (name));
+  m4_symbol *res = m4_symbol_lookup (name);
+  if (res)
+    return res;
+  else
+    m4_symbol_pushdef (name);
 }