So I'm trying to integrate libuv into Pixie, and all was going well, but I'm hitting a bit of a snag when it comes to opening files. I've tried several things, but my latest iteration is this:

https://github.com/pixie-lang/pixie/blob/async-io-file/pixie/vm/libs/uv_file.py#L104

When running this in CPython it crashes on the call to uv_fs_read with the CPython error "Fatal Python error: GC object already tracked". From what I can tell, this means something has overwritten Python's memory somehow. The odd thing is, I'm sure I have the signature of the file correct:

UV_EXTERN int uv_fs_read(uv_loop_t* loop, uv_fs_t* req, uv_file file,

void* buf, size_t length, int64_t offset, uv_fs_cb cb);

And this doesn't seem to be a problem from libuv, because this is my stacktrace from the crash:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread

0 libsystem_kernel.dylib 0x00007fff8e83c866 __pthread_kill + 10

1 libsystem_pthread.dylib 0x00007fff88f2835c pthread_kill + 92

2 libsystem_c.dylib 0x00007fff9019cb1a abort + 125

3 org.python.python 0x0000000100c73ec1 Py_FatalError + 49

4 org.python.python 0x0000000100bfc523 PyFrame_New + 598

5 org.python.python 0x0000000100c55a74 PyEval_EvalCodeEx + 74

6 org.python.python 0x0000000100bfd796 0x100bd6000 + 161686

7 org.python.python 0x0000000100bdff72 PyObject_Call + 101

8 org.python.python 0x0000000100bea9a7 0x100bd6000 + 84391

9 org.python.python 0x0000000100bdff72 PyObject_Call + 101

10 org.python.python 0x0000000100c281b4 0x100bd6000 + 336308

11 org.python.python 0x0000000100c25091 0x100bd6000 + 323729

12 org.python.python 0x0000000100c0f308 PyObject_RichCompare + 129

13 org.python.python 0x0000000100c5694e PyEval_EvalFrameEx + 1937

14 org.python.python 0x0000000100c5c864 0x100bd6000 + 551012

15 org.python.python 0x0000000100c594d4 PyEval_EvalFrameEx + 13079

16 org.python.python 0x0000000100c56093 PyEval_EvalCodeEx + 1641

17 org.python.python 0x0000000100bfd796 0x100bd6000 + 161686

Anyone have any ideas?

Thanks,

Timothy