Add tests for decode reading too far

1 files changed, 1 insertions, 0 deletions

diff --git a/errors.go b/errors.go
index e71d79a..3978d62 100644
--- a/errors.go
+++ b/errors.go
@@ -48,6 +48,7 @@ type DecodeSyntaxError struct {
 func (e *DecodeSyntaxError) Error() string {
 	return fmt.Sprintf("json: syntax error at input byte %v: %v", e.Offset, e.Err)
 }
+func (e *DecodeSyntaxError) Unwrap() error { return e.Err }
 
 // A *DecodeTypeError is returned from Decode if the JSON input is not
 // appropriate for the given Go type.