Fix Windows safetensors load order to prevent crash#61
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CharlesCNorton wants to merge 1 commit intoLightricks:mainfrom
Open
Fix Windows safetensors load order to prevent crash#61CharlesCNorton wants to merge 1 commit intoLightricks:mainfrom
CharlesCNorton wants to merge 1 commit intoLightricks:mainfrom
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On Windows, loading large safetensors files (41GB BF16 model) crashes with a segmentation fault when Gemma is already loaded in memory due to a safetensors memory mapping issue. Changes: - Reorder SingleGPUModelBuilder.build() to load state dict BEFORE applying module_ops (which load Gemma) - Make triton import conditional since it's Linux-only, with fallback for FP8 weight fusion on non-Linux systems
Qi Li (liqi-casia)
approved these changes
Jan 19, 2026
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Summary
SingleGPUModelBuilder.build()to prevent segfault on WindowsProblem
On Windows, loading a large safetensors file (41GB BF16 model) crashes with segfault when Gemma is already loaded in memory. This appears to be a safetensors memory mapping issue specific to Windows.
Solution
Load the state dict before applying module_ops (which load Gemma). This ensures the safetensors file is opened before Gemma occupies memory, avoiding the crash.
Test plan
ltx-2-19b-dev.safetensors) now loads and runs successfully🤖 Generated with Claude Code