From 62d48d2f5af95822b2c5eb020c9146f2be8d5fd3 Mon Sep 17 00:00:00 2001
From: "Sven M. Hallberg" <pesco@khjk.org>
Date: Sat, 11 May 2013 21:41:53 +0200
Subject: [PATCH] derp, forgot that table lookup can fail
---
src/backends/llk.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/backends/llk.c b/src/backends/llk.c
index f2e83108..8e44b1d9 100644
--- a/src/backends/llk.c
+++ b/src/backends/llk.c
@@ -167,6 +167,8 @@ int h_llk_compile(HAllocator* mm__, HParser* parser, const void* params)
HParseResult *h_llk_parse(HAllocator* mm__, const HParser* parser, HInputStream* stream)
{
const HLLkTable *table = parser->data;
+ assert(table != NULL);
+
HArena *arena = h_new_arena(mm__, 0); // will hold the results
HArena *tarena = h_new_arena(mm__, 0); // tmp, deleted after parse
HSlist *stack = h_slist_new(tarena);
@@ -217,6 +219,8 @@ HParseResult *h_llk_parse(HAllocator* mm__, const HParser* parser, HInputStream*
// look up applicable production in parse table
const HCFSequence *p = h_llk_lookup(table, x, lookahead);
+ if(p == NULL)
+ goto no_parse;
// push production's rhs onto the stack (in reverse order)
HCFChoice **s;
--
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