ConcurrentModificationException on activity start

[stepango]

Glide Version/Integration library (if any): Glide v3.5.2
Device/Android Version: Nexus 5 (5.0.1), Galaxy Note 2(4.4.4)
Issue details/Repro steps:
Execute code below, reproduction rate ~30%.
Glide load line:

Glide.with(getActivity())
                        .load(uri)
                        .asBitmap()
                        .transform(new BlurTransform(getActivity()))
                        .into(new SimpleTarget<Bitmap>() {
                            @Override
                            public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
                                avatarWrapper.setBackground(
                                        new BitmapDrawable(getResources(), resource)
                                );

                                Glide.with(getActivity())
                                        .load(uri)
                                        .transform(new RoundedRectTransform(getActivity(), R.dimen.round_profile_avatar))
                                        .into(avatar);
                            }
                        });

Stack trace:

java.util.ConcurrentModificationException
            at java.util.WeakHashMap$HashIterator.next(WeakHashMap.java:165)
            at com.bumptech.glide.manager.ActivityFragmentLifecycle.onStart(ActivityFragmentLifecycle.java:47)
            at com.bumptech.glide.manager.SupportRequestManagerFragment.onStart(SupportRequestManagerFragment.java:54)
            at android.support.v4.app.Fragment.performStart(Fragment.java:1810)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:987)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1136)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1499)
            at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:456)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

[stepango]

@TWiStErRob ready

[sjudd]

@stepango Thanks for the report, it's ugly but you can fix this temporarily by just posting the load call inside of onResourceReady.