[subset] Fix integer underflow in ContextFormat2.

2020-09-09 12:38:34 -07:00 · 2020-09-09 12:38:34 -07:00 · 8c3d4de796
parent ac3f859a30
commit 8c3d4de796
2 changed files with 1 additions and 1 deletions
--- a/src/hb-ot-layout-gsubgpos.hh
+++ b/src/hb-ot-layout-gsubgpos.hh
@ -1859,7 +1859,7 @@ struct ContextFormat2

    const hb_map_t *lookup_map = c->table_tag == HB_OT_TAG_GSUB ? c->plan->gsub_lookups : c->plan->gpos_lookups;
    bool ret = true;
-    unsigned non_zero_index = 0, index = 0;
+    int non_zero_index = 0, index = 0;
    for (const hb_pair_t<unsigned, const OffsetTo<RuleSet>&> _ : + hb_enumerate (ruleSet)
 								 | hb_filter (klass_map, hb_first))
    {
--- a/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5689082504806400
+++ b/test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-5689082504806400