[ot] Print format in dispatch trace
diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
index 8e2860c..84a7fc7 100644
--- a/src/hb-ot-layout-gpos-table.hh
+++ b/src/hb-ot-layout-gpos-table.hh
@@ -530,7 +530,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     case 2: return TRACE_RETURN (c->dispatch (u.format2));
@@ -822,7 +822,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     case 2: return TRACE_RETURN (c->dispatch (u.format2));
@@ -989,7 +989,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1088,7 +1088,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1209,7 +1209,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1328,7 +1328,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1387,7 +1387,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, lookup_type);
     switch (lookup_type) {
     case Single:		return TRACE_RETURN (u.single.dispatch (c));
     case Pair:			return TRACE_RETURN (u.pair.dispatch (c));
@@ -1488,8 +1488,8 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
     unsigned int lookup_type = get_type ();
+    TRACE_DISPATCH (this, lookup_type);
     unsigned int count = get_subtable_count ();
     for (unsigned int i = 0; i < count; i++) {
       typename context_t::return_t r = get_subtable (i).dispatch (c, lookup_type);
diff --git a/src/hb-ot-layout-gsub-table.hh b/src/hb-ot-layout-gsub-table.hh
index 7d6a5a7..5d67be0 100644
--- a/src/hb-ot-layout-gsub-table.hh
+++ b/src/hb-ot-layout-gsub-table.hh
@@ -222,7 +222,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     case 2: return TRACE_RETURN (c->dispatch (u.format2));
@@ -422,7 +422,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -573,7 +573,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -889,7 +889,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1053,7 +1053,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     default:return TRACE_RETURN (c->default_return_value ());
@@ -1100,7 +1100,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c, unsigned int lookup_type) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, lookup_type);
     switch (lookup_type) {
     case Single:		return TRACE_RETURN (u.single.dispatch (c));
     case Multiple:		return TRACE_RETURN (u.multiple.dispatch (c));
@@ -1275,8 +1275,8 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
     unsigned int lookup_type = get_type ();
+    TRACE_DISPATCH (this, lookup_type);
     unsigned int count = get_subtable_count ();
     for (unsigned int i = 0; i < count; i++) {
       typename context_t::return_t r = get_subtable (i).dispatch (c, lookup_type);
diff --git a/src/hb-ot-layout-gsubgpos-private.hh b/src/hb-ot-layout-gsubgpos-private.hh
index 7106870..0d4a10a 100644
--- a/src/hb-ot-layout-gsubgpos-private.hh
+++ b/src/hb-ot-layout-gsubgpos-private.hh
@@ -38,10 +38,10 @@
 
 
 
-#define TRACE_DISPATCH(this) \
+#define TRACE_DISPATCH(this, format) \
 	hb_auto_trace_t<context_t::max_debug_depth, typename context_t::return_t> trace \
 	(&c->debug_depth, c->get_name (), this, HB_FUNC, \
-	 "");
+	 "format %d", (int) format);
 
 #ifndef HB_DEBUG_CLOSURE
 #define HB_DEBUG_CLOSURE (HB_DEBUG+0)
@@ -1520,7 +1520,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     case 2: return TRACE_RETURN (c->dispatch (u.format2));
@@ -2137,7 +2137,7 @@
   template <typename context_t>
   inline typename context_t::return_t dispatch (context_t *c) const
   {
-    TRACE_DISPATCH (this);
+    TRACE_DISPATCH (this, u.format);
     switch (u.format) {
     case 1: return TRACE_RETURN (c->dispatch (u.format1));
     case 2: return TRACE_RETURN (c->dispatch (u.format2));