[indic] Tighten up base-finding
Fixes https://github.com/harfbuzz/harfbuzz/issues/4185
diff --git a/src/hb-ot-shaper-indic.cc b/src/hb-ot-shaper-indic.cc
index e3818cc..f8c970f 100644
--- a/src/hb-ot-shaper-indic.cc
+++ b/src/hb-ot-shaper-indic.cc
@@ -1067,12 +1067,15 @@
base = i;
while (base < end && is_halant (info[base]))
base++;
- info[base].indic_position() = POS_BASE_C;
+ if (base < end)
+ info[base].indic_position() = POS_BASE_C;
try_pref = false;
}
break;
}
+ if (base == end)
+ break;
}
/* For Malayalam, skip over unformed below- (but NOT post-) forms. */
if (buffer->props.script == HB_SCRIPT_MALAYALAM)
