libc++abi: terminating due to uncaught exception of type std::runtime_error: [Event::stream] Cannot access stream on invalid event.

[chopin-007]

Running a small model on a M4 Mac and after around 60-100 epochs I keep getting:
libc++abi: terminating due to uncaught exception of type std::runtime_error: [Event::stream] Cannot access stream on invalid event.
The model runs completely fine at the beginning and the it keeps crashing.

[awni]

Can you share code that reproduces the error you're seeing?

[chopin-007]

it's not exactly the same code but it should give you an indication of more or less what could cause this incident, I've identified a part of my script with these simple calculations and after taking them out the error no longer occurs (not sure which exact line was responsible for it):

import mlx.core as mx

arr_a[start_sequence:end_idx] += mx.where((arr_b > 50) & (arr_c > 0) & (arr_d < 500) & (var_a > 3), 1, 0)
arr_a_flat = arr_a[start_idx:end_idx]
arr_x = (arr_b > 50) & (arr_d < 600)
arr_y = (arr_c < 20) | (arr_d >= 600)
arr_z = mx.sum(arr_a_flat)

[awni]

Unfortunately that snippet isn’t sufficient for us to reproduce and debug this. If you can provide a standalone program that we can run that reproduces the issue that would be great.

Please also provide some more details on your environment like OS, MLX version and hardware