JNI Crash about javacv HOT 8 CLOSED

It seems to crash trying to free a CallBack object somewhere.. the only thing I 
can
see is the "new JavaCvErrorCallback().redirectError();" line. Can you try to 
remove
this line and see what happens? Thanks

Samuel

That appears to have fixed it. I will reopen if it begins happening again, but, 
for now, it appears to run perfectly.

Thank you very much. 

Ok, that's good, but it should not happen with the error callback in place 
either...
What version of JNA are you using?

Samuel

3.2.4 (b0)


Here is the Manifest file:

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.1
Created-By: 1.5.0_20-141 (Apple Inc.)
Main-Class: com.sun.jna.Native

Name: com/sun/jna/
Implementation-Title: com.sun.jna
Implementation-Vendor: JNA Development Team
Implementation-Version: 3.2.4 (b0)
Specification-Title: Java Native Access (JNA)
Specification-Vendor: JNA Development Team
Specification-Version: 3

Hum, maybe it has been fixed with 3.2.5? Let me know if it causes the same 
issue with
3.2.5, and I will look further into it, thanks

Samuel

Still had the same problem with 3.2.5; I have attached the dump. 

For now, I am going to just comment the line out since this is only for 
research. If you want, I can continue 
testing new versions of JavaCV given that I can easily recreate the crash. I 
cannot guarantee immediate 
responses, but I will try to get to it as soon as I can. Also, I will probably 
be putting my entire project on Google 
code at the end of the quarter, so you can have it then for your own testing.

I believe it has to do with the "new JavaCvErrorCallback().redirectError();" 
being called every time the function is 
called (about 5 times). I now have it placed in a constructor that is only 
called once, and I don't seem to be 
having the problem anymore. I may try creating several of these objects and see 
if that reproduces the problem, 
but that may not be until later this week.

Thanks for the followup. I figured out that the crash occurs because of a bug 
in JNA
with the garbage collection of a Callback object:
https://jna.dev.java.net/servlets/ReadMsg?list=users&msgNo=4009
But as you say, JavaCvErrorCallback is supposed to be created once and never get
garbage collected, so it should work fine yes.. marking this issue as done, and 
we'll
see if I find the related problem in JNA :)

Samuel