[BUG]: (os/kern) failure (5)

[EmilyMcIver]

Bug description

Good Day. I'm trying to use python's list type in parallelized function and I have a lot of different bug reports and sometimes correct output.

My code:

from algorithm import parallelize
from python import Python
# from utils.vector import InlinedFixedVector, DynamicVector


fn main() raises:
    var i_a = A(10)
    let b = i_a.f_1()
    print(b)

struct A:
    var v_1: Int
    var bs: PythonObject
    var rnd: PythonObject

    fn __init__(inout self,v_1: Int) raises:
        self.v_1 = v_1
        self.bs = Python.import_module("builtins")
        self.rnd = Python.import_module("random")


    fn f_1(inout self) raises -> PythonObject:
        var v_1 = self.bs.list()
        for i in range(10):
            _ = v_1.append(0)
        print(v_1)
        @parameter
        fn f_2(indx: Int):
            try:
                print(v_1[indx])
                _ = v_1.__setitem__(indx, self.rnd.randint(0,10))
                pass
            except e:
                pass
            # print(self.a)
        parallelize[f_2](10, 2)
        return v_1

Sometimes it's working properly:

Properly output ex1:

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
0
0
0
0
0
0
0
0
0
0
[10, 4, 10, 6, 0, 2, 9, 4, 1, 3]

Errors example (They are always different):

Error ex2:

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
00

00

0
Please submit a bug report to https://github.com/modularml/mojo/issues and include the crash backtrace along with all the relevant source codes.
[15490:615973:20231028,131622.799452:WARNING crash_report_exception_handler.cc:257] UniversalExceptionRaise: (os/kern) failure (5)

Error ex3

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
00

00

00

00

0
Please submit a bug report to https://github.com/modularml/mojo/issues and include the crash backtrace along with all the relevant source codes.
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  mojo                          0x000000010029d990 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  mojo                          0x000000010029baf0 llvm::sys::RunSignalHandlers() + 112
2  mojo                          0x000000010029e02c SignalHandler(int) + 344
3  libsystem_platform.dylib      0x000000019af7aa84 _sigtramp + 56
4  Python                        0x00000001100b2300 _PyObject_Malloc + 24
5  Python                        0x00000001100b2300 _PyObject_Malloc + 24
6  Python                        0x00000001100d5fe0 unicode_decode_utf8 + 116
7  Python                        0x00000001100b0600 PyObject_GetAttrString + 72
8  Python                        0x00000002800357fc PyObject_GetAttrString + 6173512260
9  libKGENCompilerRTShared.dylib 0x0000000107afe444 void* std::__1::__thread_proxy[abi:v15006]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void ((anonymous namespace)::WorkQueueThread::*)(), (anonymous namespace)::WorkQueueThread*>>(void*) + 64
10 libsystem_pthread.dylib       0x000000019af4bfa8 _pthread_start + 148
11 libsystem_pthread.dylib       0x000000019af46da0 thread_start + 8
[15461:615773:20231028,131610.839231:WARNING crash_report_exception_handler.cc:257] UniversalExceptionRaise: (os/kern) failure (5)

System information

- MacOS Ventura 13.3.1 MacBook Pro 14 M1 Pro
- mojo 0.4.0 (9e33b013)
- modular 0.2.1 (5144fffe)

[willghatch]

Thanks for the bug report. I've reproduced this. We'll take a look.

[lattner]

This works now with many recent changes, thanks!