From 87bb0298a4d1d10407160e939994bdfca5ca1791 Mon Sep 17 00:00:00 2001
From: pingyu <shui.yu@126.com>
Date: Sat, 5 Jan 2019 23:56:48 +0800
Subject: [PATCH] fix CI error, capture err returned by json.Walk

---
 expression/builtin_json.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/expression/builtin_json.go b/expression/builtin_json.go
index c4a91ca6179fa..349993ebc1634 100644
--- a/expression/builtin_json.go
+++ b/expression/builtin_json.go
@@ -849,9 +849,15 @@ func (b *builtinJSONSearchSig) evalJSON(row chunk.Row) (res json.BinaryJSON, isN
 			}
 			pathExprs = append(pathExprs, pathExpr)
 		}
-		obj.Walk(walkFn, pathExprs...)
+		err = obj.Walk(walkFn, pathExprs...)
+		if err != nil {
+			return res, true, errors.Trace(err)
+		}
 	} else {
-		obj.Walk(walkFn)
+		err = obj.Walk(walkFn)
+		if err != nil {
+			return res, true, errors.Trace(err)
+		}
 	}
 
 	// return