Segmentation fault while creating a text clip

Problem

Segmentation fault. In the logs, I see that PIL throws an error: PIL.Image - DEBUG - Error closing: Operation on closed image - 2023-06-05 20:45:11,107 Celery logs:

  | Traceback (most recent call last):   File "/Users/user1/opt/anaconda3/envs/bab/lib/python3.10/site-packages/billiard/pool.py", line 1265, in mark_as_worker_lost     raise WorkerLostError( billiard.exceptions.WorkerLostError: Worker exited prematurely: signal 11 (SIGSEGV) Job: 0.
-- | --

Code

I don't have a minimal example that replicates the error at the moment, but will add that tomorrow. Code layout basically is as follows:

API receives a request, and starts a celery task
In the task, after some other sub-tasks, I render text as follows

       text_clip_mask = VideoClip(
            lambda t: make_frame_double_text(t)[:, :, 3] / 255.0,
            duration=render_duration,
            ismask=True,
        )

in the make_frame_double_text function:

        text_segments = broken_text.split("\n")
        text_elements = []
        for i, t in enumerate(text_segments):
            x = 0 + TEXT_BOX_BORDER + 25 if i else 0 + TEXT_BOX_BORDER
            y = start_y + (i * LINE_BREAK_HEIGHT)
            text_elements.append(
                gizeh.text(
                    "  " + t,
                    fontfamily=FONT_FAMILY,
                    fontsize=SCALED_FONT_SIZE,
                    h_align="left",
                    v_align="top",
                    xy=[x, y],
                    fontslant="normal",
                    stroke=(0, 0, 0),
                    stroke_width=2,
                    fill=(1, 1, 1),
                )
            )
        for te in text_elements:
            te.draw(surface)

And this is where I get the segfault. Here is a bit more of log if that is going to be helpful:

PIL.PngImagePlugin - DEBUG - STREAM b'IHDR' 16 13 - 2023-06-05 20:45:11,060
PIL.PngImagePlugin - DEBUG - STREAM b'pHYs' 41 9 - 2023-06-05 20:45:11,060
PIL.PngImagePlugin - DEBUG - STREAM b'PLTE' 62 12 - 2023-06-05 20:45:11,061
PIL.PngImagePlugin - DEBUG - STREAM b'IDAT' 86 6972 - 2023-06-05 20:45:11,061
PIL.PngImagePlugin - DEBUG - STREAM b'IHDR' 16 13 - 2023-06-05 20:45:11,062
PIL.PngImagePlugin - DEBUG - STREAM b'pHYs' 41 9 - 2023-06-05 20:45:11,062
PIL.PngImagePlugin - DEBUG - STREAM b'PLTE' 62 12 - 2023-06-05 20:45:11,062
PIL.PngImagePlugin - DEBUG - STREAM b'IDAT' 86 6972 - 2023-06-05 20:45:11,062
PIL.Image - DEBUG - Error closing: Operation on closed image - 2023-06-05 20:45:11,107

What has been tried and zeroed down:

I tried debugging by stepping inside gizeh, and error occurs on the first line of the (text's) draw function.

Environment

OS: macOS Monterey Python version: 3.10.11 celery version: 5.2.7 moviepy: 1.0.3

Any help is appreciated.

Zulko / gizeh