Null check operator used on a null value

[aytunch]

This happens sometimes and especially when I try to pinch&zoom. And the error goes away once we pan the map.

Also when the user presses on the permission button and the OS presents the location permission dialog, this error gets triggered more often.
The video is from a release build. In the debug build, we get the red error screen all over the map. And after a hot restart, the error goes away (cmd+s)

Notes: the cat marker is not part of a cluster marker. It lives at the last layer, above the cluster marker layers. And as you can see, it renders correctly
The moment I remove MarkerClusterLayerOptions from the code, error does not happen.

Has anyone came across with this problem before?
@lpongetti if you have some time and have any leads, I would be glad to help solve this issue along with you. Thanks for this awesome plugin.

EDIT:
Line 200 is the problematic line as the debugger shows.

Seems like we use the _clusterManager.spiderfyCluster!.markers while spiderfyCluster is null. Would a simple spiderfyCluster != null check fix this?

cluster_flicker.mov

[Toolenaar]

Also having this issue

[aytunch]

@rbellens Hi, I saw your PR #125
Do you think it solves this issue as well?
Thanks.

[rbellens]

don't think it is related.

[pfraunlob]

Also having this issue

[ch-muhammad-adil]

Same problem.. Please fix....

[aytunch]

Temporarily, you can use my Fork. I made several bug fixes in the Branch and made it so that you can use flutter_map 2.0.0

  flutter_map: ^2.0.0
  flutter_map_marker_cluster:
    git:
      url: https://github.com/aytunch/flutter_map_marker_cluster

[TitanKing]

Hi @aytunch, do you perhaps have a branch with all the fixes? I do not think the maintainer of the project have much time for this anymore.

[aytunch]

@TitanKing I shared my fork above: https://github.com/aytunch/flutter_map_marker_cluster
The reason I am not opening a PR is because flutter_map_marker_popups maintainer has not updated his package.
In order to support flutter_map: ^2.0.0, I had to use someone's flutter_map_marker_popup fork.
And for publishable packages it does not allow to have forks in the pubspec.yaml.
If you want, I can open the PR with the pubspec.yaml warning. But it can not be accepted the way it is now.