The backtesting crate dynamically links to libcuda.so.1 via candle. NVIDIA CUDA dev images include stubs at /usr/local/cuda/lib64/stubs/ but only as libcuda.so (not .so.1). Create the symlink both in the Dockerfile (for future builds) and inline in the test script (for the current image). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>