From d72d37008d25d346b73a24087202bbf957733121 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 1 Jun 2022 04:43:10 -0600
Subject: [PATCH] [shape] Allow null buffer

Ouch!
---
 src/hb-shape.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hb-shape.cc b/src/hb-shape.cc
index 83d3a04ea..627625451 100644
--- a/src/hb-shape.cc
+++ b/src/hb-shape.cc
@@ -126,6 +126,9 @@ hb_shape_full (hb_font_t          *font,
 	       unsigned int        num_features,
 	       const char * const *shaper_list)
 {
+  if (unlikely (!buffer->len))
+    return true;
+
   hb_buffer_t *text_buffer = nullptr;
   if (buffer->flags & HB_BUFFER_FLAG_VERIFY)
   {