From 6ac71ea6671b9bf4b5c8978603c84d4d49775d38 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Thu, 15 Feb 2018 17:04:51 +0100
Subject: Trap lambda<0

---
 src/post-refinement.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/post-refinement.c')

diff --git a/src/post-refinement.c b/src/post-refinement.c
index b2fbb537..0966d454 100644
--- a/src/post-refinement.c
+++ b/src/post-refinement.c
@@ -330,6 +330,12 @@ static double residual_f(const gsl_vector *v, void *pp)
 		return GSL_NAN;
 	}
 
+	if ( im.lambda <= 0.0 ) {
+		crystal_free(cr);
+		if ( pv->verbose ) STATUS("lambda < 0\n");
+		return GSL_NAN;
+	}
+
 	list = copy_reflist(crystal_get_reflections(cr));
 	crystal_set_reflections(cr, list);
 
-- 
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