From de6ae7d4ebea9bf15ab3ca139a00c975826450bf Mon Sep 17 00:00:00 2001
From: Paul Yang <TeBoring@users.noreply.github.com>
Date: Thu, 11 May 2017 13:56:05 -0700
Subject: Fix upb load descriptor when no messages defined in prorto. (#3080)

---
 php/ext/google/protobuf/upb.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'php')

diff --git a/php/ext/google/protobuf/upb.c b/php/ext/google/protobuf/upb.c
index 70983016..760848e8 100644
--- a/php/ext/google/protobuf/upb.c
+++ b/php/ext/google/protobuf/upb.c
@@ -2290,6 +2290,9 @@ bool upb_symtab_addfile(upb_symtab *s, upb_filedef *file, upb_status *status) {
   bool ret;
 
   n = upb_filedef_defcount(file);
+  if (n == 0) {
+    return true;
+  }
   defs = upb_gmalloc(sizeof(*defs) * n);
 
   if (defs == NULL) {
-- 
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