awk: disallow break/continue outside of loops

function                                             old     new   delta
.rodata                                           104139  104186     +47
chain_group                                          610     633     +23
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 70/0)               Total: 70 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/editors/awk.c b/editors/awk.c
index 2f8a18c8e..607d69487 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -1671,16 +1671,18 @@ static void chain_group(void)
         case OC_BREAK:
                 debug_printf_parse("%s: OC_BREAK\n", __func__);
                 n = chain_node(OC_EXEC);
+                if (!break_ptr)
+                        syntax_error("'break' not in a loop");
                 n->a.n = break_ptr;
-//TODO: if break_ptr is NULL, syntax error (not in the loop)?
                 chain_expr(t_info);
                 break;
 
         case OC_CONTINUE:
                 debug_printf_parse("%s: OC_CONTINUE\n", __func__);
                 n = chain_node(OC_EXEC);
+                if (!continue_ptr)
+                        syntax_error("'continue' not in a loop");
                 n->a.n = continue_ptr;
-//TODO: if continue_ptr is NULL, syntax error (not in the loop)?
                 chain_expr(t_info);
                 break;