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Arminas
Wizard
Joined: 11 Jul 2002
Posts: 1265
Location: USA
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 Posted: Sun Jan 06, 2008 5:52 am
Cmud[2.18] Access Violation in Lua when using zs.cmd.call
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I created 2 aliases Alias A and Alias B.
This error occurs when you use zs.cmd.call twice on zs.func.vartype.
The following is the xml for them.
| Code: |
<?xml version="1.0" encoding="ISO-8859-1" ?>
<cmud>
<alias name="a" language="Lua">
<value>print("Alias A")
zs.cmd.unvar("data")
zs.cmd.var("data","test=1")
print(zs.func.vartype("data"))
zs.cmd.call(zs.func.vartype(var,5))
print(zs.func.vartype("data"))
zs.cmd.call(zs.func.vartype(var,5))</value>
</alias>
<alias name="b" language="Lua">
<value>print("Alias b")
zs.cmd.unvar("data")
zs.cmd.var("data","test=1")
print(zs.func.vartype("data"))
zs.func.vartype(var,5)
print(zs.func.vartype("data"))
zs.func.vartype(var,5)
print(zs.func.vartype("data"))</value>
</alias>
</cmud> |
First I ran alias b then I ran alias a.
Running A always creates the error. Running B never does.
I tried sending an automated error report but it would not work this go round. |
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_________________
Arminas, The Invisible horseman
Windows 7 Pro 32 bit
AMD 64 X2 2.51 Dual Core, 2 GB of Ram |
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Fang Xianfu
GURU
Joined: 26 Jan 2004
Posts: 5155
Location: United Kingdom
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Posted: Sun Jan 06, 2008 6:55 am
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The #call command recieves an expression argument. In terms of calling zScript from Lua, this argument will be a string, albeit one that's later parsed by the zScript parser. Your code, when used in conjunction with the #call command, must be in zScript. What you're passing there is a Lua function object, which the #call command has no idea how to handle, hence the error. Your second one is the correct way to do this, so there's no error. An illustrative example:
| Code: |
zs.cmd.call('%vartype(somevar,5)')
should work
zs.cmd.call(zs.func.vartype("somevar",5))
won't |
But also, why are you using a CMUD variable (and a database variable especially)? If your code's in Lua, use a Lua table. |
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Arminas
Wizard
Joined: 11 Jul 2002
Posts: 1265
Location: USA
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Posted: Sun Jan 06, 2008 7:50 am
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My point was that if I alter the A alias to only using the call once it DOES work. If I use it twice in the same alias
it throws the error.
And as I have been trying to make something that I will post in the General discussion forum shortly I attempted to use call to call a function silly me.  |
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_________________
Arminas, The Invisible horseman
Windows 7 Pro 32 bit
AMD 64 X2 2.51 Dual Core, 2 GB of Ram |
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