From 6881b2c5cb8b824b9c16a1e7e0035c6dfb874a4c Mon Sep 17 00:00:00 2001
From: Joshua Haberman <joshua@reverberate.org>
Date: Sun, 13 Feb 2011 18:05:19 -0800
Subject: Added proper error about broken 0-values for enums.

---
 src/upb_def.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/upb_def.c b/src/upb_def.c
index 7e962c8..879f1e8 100644
--- a/src/upb_def.c
+++ b/src/upb_def.c
@@ -476,6 +476,12 @@ static upb_flow_t upb_enumdef_EnumValueDescriptorProto_value(void *_b,
       break;
     case GOOGLE_PROTOBUF_ENUMVALUEDESCRIPTORPROTO_NUMBER_FIELDNUM:
       b->number = upb_value_getint32(val);
+      if (b->number == 0) {
+        upb_seterr(&b->status, UPB_ERROR,
+                   "Enums with a value of 0 are currently broken; see "
+                   "http://code.google.com/p/upb/issues/detail?id=1.");
+        return UPB_BREAK;
+      }
       b->saw_number = true;
       break;
     default:
-- 
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