Fix panic

When shutting down a receiver a panic ensues because the waitGroup
index becomes less than zero

Some miscellaneous spelling errors fixed.
When scanning b2c error print string that causes error.

Found during development of anothet feature. Fix was tested during
feature development.

AB#9875

azbus/receiver.go

@@ -163,7 +163,7 @@ func (r *Receiver) String() string {
 func (r *Receiver) processMessage(ctx context.Context, count int, maxDuration time.Duration, msg *ReceivedMessage, handler Handler) {
 	now := time.Now()
 
-	// the context wont have a trace span on it yet, so stick with the reciever logger instance
+	// the context wont have a trace span on it yet, so stick with the receiver logger instance
 
 	r.log.Debugf("Processing message %d id %s", count, msg.MessageID)
 	disp, ctx, err := r.handleReceivedMessageWithTracingContext(ctx, msg, handler)
@@ -240,7 +240,6 @@ func (r *Receiver) receiveMessages(ctx context.Context) error {
 				select {
 				case <-rctx.Done():
 					rr.log.Debugf("Stop worker %d", ii)
-					wg.Done()
 					return
 				case msg := <-msgs:
 					func(rrctx context.Context) {

errhandling/errb2c.go

@@ -47,7 +47,7 @@ func (e *ErrB2C) WithErrorString(log Logger, errString string) error {
 	if _, scanErr := fmt.Sscanf(errString, b2cFmtString,
 		&e.APIVersion, &e.Status, &e.UserMessage); scanErr != nil {
 
-		log.Infof("scan error: %v", scanErr)
+		log.Debugf("scan error %s: %v", errString, scanErr)
 		return scanErr
 	}
 
@@ -72,15 +72,15 @@ func GetErrB2c(ctx context.Context, err error) (*ErrB2C, error) {
 
 	// chance it is a status.Error (can't access status.Error as its part of an internal package)
 	if !strings.HasPrefix(err.Error(), grpcErrPrefix) {
-		log.Infof("error is not b2c error: %v", err)
+		log.Debugf("error is not b2c error: %v", err)
 		return nil, err
 	}
 
 	// can't use errors.Unwrap because status.Error doesn't implement Unwrap method
 	b2cErrString := strings.TrimPrefix(err.Error(), grpcErrPrefix)
 
 	if convErr := errB2C.WithErrorString(log, b2cErrString); convErr != nil {
-		log.Infof("unable to add error string: %v", convErr)
+		log.Debugf("unable to add error string: %v", convErr)
 		return nil, convErr
 	}
 

restproxyserver/restproxyserver.go

@@ -74,7 +74,7 @@ func SetQueryParameterParser(p QueryParameterParser) RESTProxyServerOption {
 	}
 }
 
-// WithIncomingHeaderMatcher adds an intercepror that matches header values.
+// WithIncomingHeaderMatcher adds an interceptor that matches header values.
 func WithIncomingHeaderMatcher(o HeaderMatcherFunc) RESTProxyServerOption {
 	return func(g *RESTProxyServer) {
 		if o != nil && !reflect.ValueOf(o).IsNil() {