Calling jpy.get_type() too many times causes a memory access error

[dpallison83]

Running jpy 0.9, ran into this problem (running Windows):

Process finished with exit code -1073741819 (0xC0000005)

briefly googling, appears this is a memory access error code, which is easily reproducible like so

import jpy
for i in range(200):
    jpy.get_type("java.lang.String")

The number of iterations it takes to bring up the error varies by class. I'd try to fix it myself, but I'm no expert with C.

[forman]

Thanks for reporting this. Hope to fix it ASAP.

[voutilad]

I can confirm it's an issue on macOS as well, so it's platform independent. Better error message, though:

Running /Users/dave/src/sisu-llc/jpy/src/test/python/jpy_gettype_test.py
....python(93039,0x7fffb94183c0) malloc: *** error for object 0x10f74a010: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
setting environment variable 'PYTHONPATH' to None
1 Python unit test(s) failed. Installation is likely broken.

[voutilad]

See PR. Looks like a reference counting issue. The joys of embedded Python!

[bcdev]

Seems to be fixed now. Carefully closing it.