display friendly error message on handshake error (go-mysql-org#435)

dhlin · siddontang · commit e4fc33683f45 · 2019-10-14T15:09:46.000+08:00
diff --git a/client/auth.go b/client/auth.go
@@ -34,7 +34,7 @@ func (c *Conn) readInitialHandshake() error {
 	}
 
 	if data[0] == ERR_HEADER {
-		return errors.New("read initial handshake error")
+		return errors.Annotate(c.handleErrorPacket(data), "read initial handshake error")
 	}
 
 	if data[0] < MinProtocolVersion {

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@ func (c *Conn) readInitialHandshake() error {`
`34`	`34`	`}`
`35`	`35`
`36`	`36`	`if data[0] == ERR_HEADER {`
`37`		`- return errors.New("read initial handshake error")`
	`37`	`+ return errors.Annotate(c.handleErrorPacket(data), "read initial handshake error")`
`38`	`38`	`}`
`39`	`39`
`40`	`40`	`if data[0] < MinProtocolVersion {`