Hi!
I've been playing around lately with Squirrel, and tried to write a custom Behaviour Tree implementation when i've stumbled upon the language crash.
It's most likely occuring only when we use closure.acall with vargv and resume the generator.
I've tried to debug it myself (and still trying) but unfortunately i wasn't able to narrow down the root cause of this issue.
Here's the reproduction code:
BT <- {}
class BT.NodeState
{
RUNNING = 0
SUCCESS = 1
FAILURE = 2
}
class BT.Node
{
state = BT.NodeState.RUNNING
children = null
constructor(...)
{
this.children = vargv
}
function evaluate(...)
{
throw "Not implemented"
}
_result = null
function _evaluate(vargv)
{
vargv.insert(0, this)
if (_result == null)
_result = evaluate.acall(vargv)
if (type(_result) == "generator")
{
local state = resume _result
if (_result.getstatus() == "dead")
_result = null
return state
}
local state = _result
_result = null
return state
}
}
class BT.Selector extends BT.Node
{
function evaluate(...)
{
foreach (node in children)
{
state = node._evaluate(vargv)
switch (state)
{
case BT.NodeState.SUCCESS:
return state
case BT.NodeState.RUNNING:
do
{
yield state
state = node._evaluate(vargv)
} while (state == BT.NodeState.RUNNING)
}
}
return state
}
}
class BT.Tree extends BT.Node
{
constructor(root_node)
{
base.constructor(root_node)
}
function evaluate(...)
{
local root_node = children[0]
return root_node._evaluate(vargv)
}
function tick(...)
{
local root_node = children[0]
local result = root_node._evaluate(vargv)
return result
}
}
local ai = BT.Tree(
BT.Selector(
BT.Selector(
)
)
)
local memory = {persistent = {}, volatile = {}}
ai.tick(-1, memory)After first invocation of the ai.tick, the crash will occur, removing either generator from BT.Node or vargv passing to a evaluate method solves the problem, but this doesn't satisfy my needs.
Hi!
I've been playing around lately with Squirrel, and tried to write a custom Behaviour Tree implementation when i've stumbled upon the language crash.
It's most likely occuring only when we use
closure.acallwithvargvandresume the generator.I've tried to debug it myself (and still trying) but unfortunately i wasn't able to narrow down the root cause of this issue.
Here's the reproduction code:
After first invocation of the ai.tick, the crash will occur, removing either
generatorfromBT.Nodeorvargvpassing to aevaluatemethod solves the problem, but this doesn't satisfy my needs.