IndexerThreadPool built its per-worker indexers from the raw requested algorithm
but dispatched the RESOLVED one. Rotation indexing always resolves to the GPU FFT
indexer when a GPU is present, so requesting FFTW (the CPU indexer) on a GPU node
created only the CPU indexer and then failed at dispatch with an opaque "no
indexer available for the resolved indexing algorithm" deep inside a worker.
Validate servability at the pool entry (in the caller's context) and throw an
actionable message instead: FFTW is not available on a GPU node (use FFT/Auto, or
a CPU-only node); FFT/FFBIDX require a GPU. Stills FFTW on a GPU node, which the
algorithm resolution still honours, keeps working.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
d8e909a393