Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

NPE when clearing points with bodies in world #29

Open
GoogleCodeExporter opened this issue Mar 7, 2016 · 0 comments
Open

NPE when clearing points with bodies in world #29

GoogleCodeExporter opened this issue Mar 7, 2016 · 0 comments
Labels
auto-migrated Priority-Medium Type-Defect

Comments

@GoogleCodeExporter
Copy link 

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at com.badlogic.gdx.physics.box2d.World.destroyBody(World.java:309)
    at aurelienribon.bodyeditor.canvas.rigidbodies.RigidBodiesScreen.clearWorld(Unknown Source)
    at aurelienribon.bodyeditor.canvas.rigidbodies.RigidBodiesScreen.access$300(Unknown Source)


In RigidBodiesStream:

Iterator<Body> bodies = world.getBodies();
while (bodies.hasNext()) world.destroyBody(bodies.next());

This look suspicious; are you sure the iterator's backing collection isn't 
modified?

A conservative approach:

boolean empty = false;
while (!empty) {
  Iterator<Body> bodies = world.getBodies();
  empty = !bodies.hasNext();
  if (!empty) {
    world.destroyBody(bodies.next());
  }
}

Original issue reported on code.google.com by ernest.m...@gmail.com on 20 Mar 2014 at 3:00
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
auto-migrated Priority-Medium Type-Defect
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
1 participant
@GoogleCodeExporter