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IndexError: index 29 is out of bounds for dimension 0 with size 29 #9362

@Anvarka

Description

@Anvarka

Describe the bug

I have three problems because of the same reason.

  1. TypeError: unsupported operand type(s) for +=: 'NoneType' and 'int'
    # upon completion increase step index by one
    self._step_index += 1 <---Error here
  2. IndexError: index 29 is out of bounds for dimension 0 with size 29
    sigma_next = self.sigmas[self.step_index + 1] <--- Error here
  3. RuntimeError: Already borrowed
    if _truncation is not None:
    self._tokenizer.no_truncation() <--- Error here
    Example: RuntimeError: Already borrowed tokenizers#537
    The reason, as I understood, is threads. Do you know, how can I solve this problem?

Reproduction

from diffusers import (
    FluxPipeline,
    FlowMatchEulerDiscreteScheduler,
)
import torch

pipeline = FluxPipeline.from_pretrained(
    "black-forest-labs/FLUX.1-schnell", torch_dtype=torch.bfloat16
).to("cuda")

seed = 42
height = 720
width = 1280

generator = torch.Generator(device="cuda").manual_seed(seed)

pipeline(
    prompt=prompt + ", highly detailed, all is depicted as silhouettes, without words",
    guidance_scale=0.,
    # num_inference_steps=10,
    height=height,
    width=width,
    generator=generator,
    max_sequence_length=256,
).images[0]

Logs

For example:
 Traceback (most recent call last):
   File "/opt/conda/lib/python3.10/site-packages/flask/app.py", line 1473, in wsgi_app
     response = self.full_dispatch_request()
   File "/opt/conda/lib/python3.10/site-packages/flask/app.py", line 882, in full_dispatch_request
     rv = self.handle_user_exception(e)
   File "/opt/conda/lib/python3.10/site-packages/flask/app.py", line 880, in full_dispatch_request
     rv = self.dispatch_request()
   File "/opt/conda/lib/python3.10/site-packages/flask/app.py", line 865, in dispatch_request
     return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
   File "/app/main.py", line 29, in generate_image
     image = imagegen.run(**data)
   File "/app/image_generator.py", line 102, in run
     return generate_image()
   File "/app/image_generator.py", line 89, in generate_image
     return self.pipeline(
   File "/opt/conda/lib/python3.10/site-packages/torch/utils/_contextlib.py", line 115, in decorate_context
     return func(*args, **kwargs)
   File "/opt/conda/lib/python3.10/site-packages/diffusers/pipelines/flux/pipeline_flux.py", line 734, in __call__
     latents = self.scheduler.step(noise_pred, t, latents, return_dict=False)[0]
  File "/opt/conda/lib/python3.10/site-packages/diffusers/schedulers/scheduling_flow_match_euler_discrete.py", line 295, in step
     sigma_next = self.sigmas[self.step_index + 1]
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

System Info

  • 🤗 Diffusers version: 0.31.0.dev0
  • Platform: Linux-5.4.0-171-generic-x86_64-with-glibc2.35
  • Running on Google Colab?: No
  • Python version: 3.10.13
  • PyTorch version (GPU?): 2.2.1 (True)
  • Flax version (CPU?/GPU?/TPU?): not installed (NA)
  • Jax version: not installed
  • JaxLib version: not installed
  • Huggingface_hub version: 0.24.6
  • Transformers version: 4.44.2
  • Accelerate version: 0.34.0
  • PEFT version: 0.12.0
  • Bitsandbytes version: not installed
  • Safetensors version: 0.4.4
  • xFormers version: not installed
  • Accelerator: NVIDIA RTX A6000, 46068 MiB
  • Using GPU in script?:
  • Using distributed or parallel set-up in script?:

Who can help?

@yiyixuxu @sayakpaul @DN6

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