From a99dec5f78e36c6659306c3a063a47b13e69b233 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Fri, 22 Oct 2021 12:58:37 +0200
Subject: pair_peaks: Skip reflections if the indices are too large

---
 libcrystfel/src/predict-refine.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libcrystfel/src/predict-refine.c b/libcrystfel/src/predict-refine.c
index 9b562fb0..9bee242c 100644
--- a/libcrystfel/src/predict-refine.c
+++ b/libcrystfel/src/predict-refine.c
@@ -215,6 +215,14 @@ static int pair_peaks(struct image *image, Crystal *cr,
 		/* Don't pair with 000, because that can cause trouble later */
 		if ( (h==0) && (k==0) && (l==0) ) continue;
 
+		if ( (abs(h)>=512) || (abs(k)>=512) || (abs(l)>=512) ) {
+			ERROR("Peak %i (on panel %s at %.2f,%.2f) has indices too "
+			      "large for pairing (%.0f %.0f %.0f)\n",
+			      i, image->detgeom->panels[f->pn].name,
+			      f->fs, f->ss, h, k, l);
+			continue;
+		}
+
 		refl = reflection_new(h, k, l);
 		if ( refl == NULL ) {
 			ERROR("Failed to create reflection\n");
-- 
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