diff --git a/cmd/genbindings/intermediate.go b/cmd/genbindings/intermediate.go
index 6f0f4fb3..e4de0c5f 100644
--- a/cmd/genbindings/intermediate.go
+++ b/cmd/genbindings/intermediate.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"log"
 	"regexp"
 	"strings"
 )
@@ -17,6 +18,12 @@ type CppParameter struct {
 	QtCppOriginalType *CppParameter // If we rewrote QStringList->QList<String>, this field contains the original QStringList. Otherwise, it's blank
 }
 
+func (p CppParameter) String() string {
+	return "Param(" + ifv(p.Const, "const ", "") + p.ParameterType +
+		ifv(p.Pointer, strings.Repeat("*", p.PointerCount), "") + ifv(p.ByRef, "&", "") +
+		ifv(p.Optional, "?", "") + " " + p.ParameterName + ")"
+}
+
 func (p *CppParameter) ApplyTypedef(matchedUnderlyingType CppParameter) {
 	if p.QtCppOriginalType == nil {
 		tmp := *p                  // Copy
@@ -479,7 +486,8 @@ func (c *CppClass) VirtualMethods() []CppMethod {
 			// m is copied by value. Mutate it
 			applyTypedefs_Method(&m)
 			// Same with astTransformBlocklist
-			if !blocklist_MethodAllowed(&m) {
+			if err := blocklist_MethodAllowed(&m); err != nil {
+				log.Printf("Blocking method %q(%v): %s", m.MethodName, m.Parameters, err)
 				continue
 			}
 
diff --git a/cmd/genbindings/main.go b/cmd/genbindings/main.go
index 308915cc..7293355d 100644
--- a/cmd/genbindings/main.go
+++ b/cmd/genbindings/main.go
@@ -329,6 +329,8 @@ func generateClangCaches(includeFiles []string, clangBin string, cflags []string
 }
 
 func main() {
+	// data/time flags make logs hard to compare across runs
+	log.SetFlags(log.Flags() &^ (log.Ldate | log.Ltime))
 	clang := flag.String("clang", "clang", "Custom path to clang")
 	outDir := flag.String("outdir", "../../", "Output directory for generated gen_** files")
 	extraLibsDir := flag.String("extralibs", "/usr/local/src/", "Base directory to find extra library checkouts")
diff --git a/cmd/genbindings/transformblocklist.go b/cmd/genbindings/transformblocklist.go
index 7d9294a3..4c1ea829 100644
--- a/cmd/genbindings/transformblocklist.go
+++ b/cmd/genbindings/transformblocklist.go
@@ -1,18 +1,20 @@
 package main
 
-func blocklist_MethodAllowed(m *CppMethod) bool {
+import "log"
+
+func blocklist_MethodAllowed(m *CppMethod) error {
 	if err := AllowType(m.ReturnType, true); err != nil {
-		return false
+		return err
 	}
 
 	for _, p := range m.Parameters {
 		if err := AllowType(p, false); err != nil {
-			return false
+			return err
 		}
 	}
 
 	// Nothing was blocked
-	return true
+	return nil
 }
 
 // astTransformBlocklist filters out methods using too-complex parameter types,
@@ -49,7 +51,9 @@ func astTransformBlocklist(parsed *CppParsedHeader) {
 		j := 0
 	nextCtor:
 		for _, m := range c.Ctors {
-			if !blocklist_MethodAllowed(&m) {
+			if err := blocklist_MethodAllowed(&m); err != nil {
+				log.Printf("Blocking constructor %q(%v): %s", m.MethodName, m.Parameters, err)
+
 				continue nextCtor
 			}
 
@@ -64,7 +68,8 @@ func astTransformBlocklist(parsed *CppParsedHeader) {
 		j = 0
 	nextMethod:
 		for _, m := range c.Methods {
-			if !blocklist_MethodAllowed(&m) {
+			if err := blocklist_MethodAllowed(&m); err != nil {
+				log.Printf("Blocking method %q(%v): %s", m.MethodName, m.Parameters, err)
 				continue nextMethod
 			}