SDRClassifier compute causes segmentation fault

[ywcui1990]

The segmentation fault happens everytime the classifier compute() function writes more than 2 times to the same ClassifierResult instance.

For example, as in the unit test, adding 2 more computes to the same result will cause not only some assertion errors, but also:

c.fastCompute(0, input1, 4, 34.7, false, true, true, &result1); c.fastCompute(1, input1, 4, 34.7, false, true, true, &result1); c.fastCompute(2, input1, 4, 34.7, false, true, true, &result1);

*** Error in./unit_tests': free(): invalid next size (fast): 0x00007f5e58003290 ***
Aborted (core dumped)`

If this is run outside gtest, then the error is just a simple "segmentation fault".
The way I got around this is by destroying the result object and creating a new one before every compute(), however this defeats the whole purpose of having an associative array inside the result.

See full discussion on this issue on the discourse forum

[dorinclisu]

Also, this happens with both the CLAClassifier and the SDRClassifier, because they write to ClassifierResult in the same way.

[rhyolight]

@natoromano Are you interested in working on this?

[RuneKR]

@rhyolight is this something that is currently being worked on?

[rhyolight]

@MedSolve I don't think anyone is working on this right now.

[RuneKR]

I found the course of my problem. I need to classify between 25.000 different classes and this results in high bucketIdx that in return makes everything crash.

-- My bucketIdx had a high offset so adjusting them to be only between 1 and 25.000 worked