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NoEnv tampers with msgbox/strput()...

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RaptorX

Post subject: NoEnv tampers with msgbox/strput()...

Posted: December 22nd, 2011, 10:09 pm

Joined: February 19th, 2010, 8:07 pm
Posts: 616

Hi,

I didn't find the following behavior documented in the help file, and it is something that i dont consider as desired, so i will post it here as a bug just in case it is one:

Code:

#NoEnv

VarSetCapacity(Q, strlen("test")), StrPut("test", &Q)
msgbox % Q

Thing is that as soon as you comment the #NoEnv directive, the msgbox will be empty.

I have checked the contents of the variable using a hexviewer and the variable pointer does contain the data but for some reason it is not shown.

It happens in both Ansi & Unicode versions of L v1.1.05.04

The name of the variable doesnt change the results, which considering that NoEnv has to do with environment variables, i thought it should.

(Thanks to adabo for helping me find this little bug.)

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• Main Project: AutoHotkey Toolkit
Unless specified otherwise all my code is written for the latest Autohotkey L Unicode version.

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jaco0646

Post subject:

Posted: December 22nd, 2011, 10:41 pm

Joined: October 7th, 2006, 4:50 pm
Posts: 3157
Location: MN, USA

Sounds like this bug report.

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RaptorX

Post subject:

Posted: December 22nd, 2011, 11:08 pm

Joined: February 19th, 2010, 8:07 pm
Posts: 616

Yes very similar indeed but is this an expected behavior?
because i find no logic in what has NoEnv to do with all that :shock:

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• Main Project: AutoHotkey Toolkit
Unless specified otherwise all my code is written for the latest Autohotkey L Unicode version.

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nimda

Post subject:

Posted: December 22nd, 2011, 11:43 pm

Joined: December 26th, 2010, 7:40 pm
Posts: 4172
Location: Awesometown, USA

Code:

;#NoEnv

VarSetCapacity(Q, strlen("test")), StrPut("test", &Q),VarSetCapacity(Q, -1)
msgbox % Q ; works

Uhh... why does #NoEnv magically help AHK read the variables?

Edit:

Code:

;#NoEnv
VarSetCapacity(Q, strlen("test"), 1), StrPut("test", &Q)
msgbox % Q ; works

Code:

;#NoEnv

VarSetCapacity(Q, strlen("test"), 0), StrPut("test", &Q)
msgbox % Q ; doesn't work

So it has to do with the null-terminator

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RaptorX

Post subject:

Posted: December 23rd, 2011, 2:47 am

Joined: February 19th, 2010, 8:07 pm
Posts: 616

nimda wrote:

So it has to do with the null-terminator

Yes after reading the whole topic linked by jaco0646 i arrived to the same conclusion!

The interesting point here is that this happens with that particular directive... Lexikos explains why on the other post as well.

But it is kind of curious anyways.

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• Main Project: AutoHotkey Toolkit
Unless specified otherwise all my code is written for the latest Autohotkey L Unicode version.

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