+2000-06-06 Jakub Jelinek <jakub@redhat.com>
+
+ * cpplib.c (do_ifdef, do_ifndef): Don't segfault if parse_ifdef
+ returned NULL.
+
Wed Jun 7 20:34:33 2000 Denis Chertykov <denisc@overta.ru>
* config/avr/avr.c (asm_output_section_name): output section
{
int def = 0;
const cpp_hashnode *node = parse_ifdef (pfile, dtable[T_IFDEF].name);
- if (node->type == T_POISON)
- cpp_error (pfile, "attempt to use poisoned `%s'", node->name);
- else
- def = (node->type != T_VOID);
+ if (node)
+ {
+ if (node->type == T_POISON)
+ cpp_error (pfile, "attempt to use poisoned `%s'", node->name);
+ else
+ def = (node->type != T_VOID);
+ }
push_conditional (pfile, !def, T_IFDEF, 0);
return 0;
}
start_of_file = pfile->only_seen_white == 2;
cmacro = parse_ifdef (pfile, dtable[T_IFNDEF].name);
- if (cmacro->type == T_POISON)
- cpp_error (pfile, "attempt to use poisoned `%s'", cmacro->name);
- else
- def = (cmacro->type != T_VOID);
-
+ if (cmacro)
+ {
+ if (cmacro->type == T_POISON)
+ cpp_error (pfile, "attempt to use poisoned `%s'", cmacro->name);
+ else
+ def = (cmacro->type != T_VOID);
+ }
push_conditional (pfile, def, T_IFNDEF,
start_of_file ? cmacro : 0);
return 0;
--- /dev/null
+/* Regression test: #ifdef 0 should not crash. Problem noted by
+ Jakub Jelinek <jakub@redhat.com>. */
+/* { dg-do preprocess } */
+
+#ifdef 0 /* { dg-error "with invalid argument" } */
+#error not seen
+#endif
+
+#ifndef 0 /* { dg-error "with invalid argument" } */
+#else
+#error not seen
+#endif