From 871a9a1f4a505d932672a62e389067f0125fc0e0 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Tue, 16 Jun 2020 17:02:31 +0200
Subject: substitute_path: Special case for no placeholders

---
 libcrystfel/src/image-hdf5.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libcrystfel/src/image-hdf5.c b/libcrystfel/src/image-hdf5.c
index 13d0c5ed..a203f6ac 100644
--- a/libcrystfel/src/image-hdf5.c
+++ b/libcrystfel/src/image-hdf5.c
@@ -207,6 +207,15 @@ static char *substitute_path(const char *ev, const char *pattern)
 		return NULL;
 	}
 
+	if ( n_pl_exp == 0 ) {
+		/* No placeholders in path */
+		for ( i=0; i<n_plvals; i++ ) {
+			free(plvals[i]);
+		}
+		free(plvals);
+		return strdup(pattern);
+	}
+
 	total_len = strlen(pattern) - n_pl_exp;
 	for ( i=0; i<n_plvals; i++ ) {
 		total_len += strlen(plvals[i]);
-- 
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