Bug 1147 - Generic method failing "at mini-generic-sharing.c:407, condition `!(*oti)->data' not met"
Summary: Generic method failing "at mini-generic-sharing.c:407, condition `!(*oti)->da...
Alias: None
Product: Runtime
Classification: Mono
Component: General ()
Version: unspecified
Hardware: PC Mac OS
: High normal
Target Milestone: ---
Assignee: Bugzilla
: 1618 ()
Depends on:
Reported: 2011-09-29 21:22 UTC by Phi
Modified: 2017-08-28 15:04 UTC (History)
6 users (show)

Is this bug a regression?: ---
Last known good build:

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Comment 1 Zoltan Varga 2011-10-04 00:29:37 UTC
You can run with -O=-gshared as a workaround. Would it be possible to extract a testcase from this app which doesn't depend on monomac etc. ?
Comment 2 Phi 2011-10-05 12:39:35 UTC
I tried making a simpler test case without monomac and mobcj, but that code didn't have any problem.
Comment 3 Phi 2011-10-05 17:46:33 UTC
I have a new test case.
Please notices my comments to see when the code break or not.

using System;
using System.Collections.Generic;

namespace Program {
    public class AxControlEventArgs<T> : EventArgs where T : WindowlessControl {
        public T Control { get; private set; }

        public AxControlEventArgs(T control) {
            Control = control;
    public class AxControlEventArgs : AxControlEventArgs<WindowlessControl> {
        public AxControlEventArgs(WindowlessControl c) : base(c) { }

    public class AlignPadLayoutPanel : AlignPadLayoutPanel<WindowlessControl> { }

    public class AlignPadLayoutPanel<T> : WindowlessControl where T : WindowlessControl {
        protected override void OnControlAdded(AxControlEventArgs e) {
            e.Control.Resize += Content_Resize; //OK if removed

        private void Content_Resize(object sender, EventArgs e) { }

    public class GroupBox : AlignPadLayoutPanel { } //NOT OK
    //public class GroupBox : AlignPadLayoutPanel<WindowlessControl> {} //OK

    public class Program {
        public static readonly AttachedProperty<string> EDITING_TEXT = new AttachedProperty<string>(null);

        static void Main(string[] args) {
            Console.WriteLine("Program 6");

            var gr = new GroupBox();

            //gr.InsertControl(0, new WindowlessControl()); //OK

            /* need this block(A) this to crash */
            var item = new WindowlessControl();

            new AlignPadLayoutPanel<WindowlessControl>().InsertControl(0, item); //OK if removed 

            item.SetAttachedProperty(EDITING_TEXT, "label.Text");
            /*end block(A)*/

            gr.InsertControl(0, new WindowlessControl()); //NOT OK			

            var wc = new WindowlessControl();
            wc.SetAttachedProperty(EDITING_TEXT, "label.Text");
            var str = wc.GetAttachedProperty(EDITING_TEXT);


    //public static class WindowlessControlExtensions {
    //    public static void SetAttachedProperty<T>(this WindowlessControl c, AttachedProperty<T> prop, T val) {
    //        Console.WriteLine("ext SetAttachedProperty 1");
    //        c._AttachedProperties[prop] = val;
    //        Console.WriteLine("ext SetAttachedProperty 2");
    //    }

    //    public static T GetAttachedProperty<T>(this WindowlessControl c, AttachedProperty<T> prop) {
    //        Console.WriteLine("ext GET AttachedProperty");
    //        return (T)(c._AttachedProperties[prop] ?? prop.DefaultValue);
    //    }

    public class WindowlessControl {
        internal readonly Dictionary<object, object> _AttachedProperties = new Dictionary<object, object>();

        public void SetAttachedProperty<T>(AttachedProperty<T> prop, T val) {
            Console.WriteLine("SetAttachedProperty 1");
            _AttachedProperties[prop] = val;
            Console.WriteLine("SetAttachedProperty 2");

        public T GetAttachedProperty<T>(AttachedProperty<T> prop) {
            Console.WriteLine("GET AttachedProperty");
            return (T)(_AttachedProperties[prop] ?? prop.DefaultValue);

        public event EventHandler Resize;

        public void InsertControl(int index, WindowlessControl control) {
            OnControlAdded(new AxControlEventArgs(control));

        protected virtual void OnControlAdded(AxControlEventArgs e) { }

    public struct AttachedProperty<T> {
        public T DefaultValue { get; private set; }

        public AttachedProperty(T defaultValue) : this() {
            DefaultValue = defaultValue;

Comment 4 Zoltan Varga 2011-10-21 05:00:45 UTC
*** Bug 1618 has been marked as a duplicate of this bug. ***
Comment 6 Rodrigo Kumpera 2012-01-05 07:02:31 UTC
Fixed in master, 2.10 and MM