fix invalid free

src/console/main.zig

@@ -413,7 +413,8 @@ pub fn main() !void {
     var app = try vxfw.App.init(allocator);
     defer app.deinit();
 
-    const asd = Observer(*Tab){
+    const childrenLoadedObserver = try allocator.create(Observer(*Tab));
+    childrenLoadedObserver.* = Observer(*Tab){
         .ctx = @ptrCast(@alignCast(&app)),
         .update = (struct{fn update(ctx: *anyopaque, _: *Tab)void {
             const app1: *vxfw.App = @ptrCast(@alignCast(ctx));
@@ -421,7 +422,7 @@ pub fn main() !void {
         }}).update,
     };
 
-    try app_common_model.appState.tabChildrenLoaded.attach(&asd);
+    try app_common_model.appState.tabChildrenLoaded.attach(childrenLoadedObserver);
 
     try app.run(model.widget(), .{});
 

src/core/app_state.zig

@@ -45,7 +45,8 @@ pub const AppState = struct {
         } else null;
 
         if (index) |i| {
-            tab.childrenLoaded.observers.swapRemove(i);
+            const removed = tab.childrenLoaded.observers.swapRemove(i);
+            self.allocator.destroy(removed);
         }
 
         //TODO: remove from tabs

src/core/observable.zig

@@ -12,7 +12,7 @@ pub fn Observable(T: type) type {
         }
 
         pub fn deinit(self: *Self) void {
-            for(self.observers)|o| {
+            for(self.observers.items)|o| {
                 self.allocator.destroy(o);
             }
             self.observers.deinit();