Wrap the context render panic.

Panic handling middleware can test for this error and decide to
supress the error or not.

context.go

@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/gin-contrib/sse"
+
 	"github.com/gin-gonic/gin/binding"
 	"github.com/gin-gonic/gin/render"
 )
@@ -922,7 +923,10 @@ func (c *Context) Render(code int, r render.Render) {
 	}
 
 	if err := r.Render(c.Writer); err != nil {
-		panic(err)
+		panic(Error{
+			Err:  err,
+			Type: ErrorTypeRender,
+		})
 	}
 }
 

context_test.go

@@ -24,10 +24,11 @@ import (
 	"time"
 
 	"github.com/gin-contrib/sse"
-	"github.com/gin-gonic/gin/binding"
-	testdata "github.com/gin-gonic/gin/testdata/protoexample"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/protobuf/proto"
+
+	"github.com/gin-gonic/gin/binding"
+	testdata "github.com/gin-gonic/gin/testdata/protoexample"
 )
 
 var _ context.Context = (*Context)(nil)
@@ -655,6 +656,16 @@ func TestContextRenderPanicIfErr(t *testing.T) {
 	defer func() {
 		r := recover()
 		assert.Equal(t, "TestPanicRender", fmt.Sprint(r))
+
+		// confirm the recovered object is an error
+		err, ok := r.(error)
+		assert.True(t, ok)
+
+		// the error returned should be a gin render Error
+		e := Error{}
+		assert.True(t, errors.As(err, &e))
+		assert.ErrorContains(t, e.Unwrap(), "TestPanicRender")
+		assert.True(t, e.IsType(ErrorTypeRender))
 	}()
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)