The "keep what the crystal came in with" gate required std::isfinite(cc) before it
would reject, so a refined model whose CC could not be measured at all was adopted.
ImageReferenceCC returns NaN when fewer than 20 reflections clear the partiality
cut - which is exactly what a refinement that collapsed the partialities produces,
since the cut is on the partialities it just rewrote. The gate therefore failed
open on precisely the crystals it exists to catch, and wrote the NaN into
image_scale_cc, on which --min-image-cc then drops the image from the merge, the
error model and the statistics.
Treat a CC that cannot be measured as worse than one that can, so the crystal is
put back exactly as it arrived.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5
da74197dea