Blender Version
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-18 22:21, hash: rBfc182e318988
Worked: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-03 19:00, hash: rBd62a749fcf48

Short description of error
Blender crashes to desktop when an operator is called from a timer- ONLY on the second time the timer fires! This was not happening a couple of weeks ago (see last working version, I still have that build and the supplied script does not cause a crash)

Exact steps for others to reproduce the error
Run the attached python script. The first time the timer is triggered, it will work correctly- the second time it is triggered (10 seconds later) {F7268889}Blender will crash to desktop.

Edit: script and crash log attached for your convenience

import bpy

def main(context):
    print("Crash will occur on the second timer trigger")

class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "object.simple_operator"
    bl_label = "Simple Object Operator"

    def execute(self, context):
        main(context)
        return {'FINISHED'}

def test():    
    bpy.ops.object.simple_operator()
    return 10.0

def register():
    bpy.utils.register_class(SimpleOperator)
    bpy.app.timers.register(test)

def unregister():
    bpy.utils.unregister_class(SimpleOperator)
    bpy.app.timers.unregister(test)

if __name__ == "__main__":
    register()