Fix crash

snakecnv/bin/insert_size_distro.py

@@ -93,8 +93,9 @@ def insert_size_distro(bamfile, chrom, outdir,
 
     new_len = len(L)
     removed = c - new_len
-    sys.stderr.write("Removed %d outliers with isize >= %d\n" %
-                     (removed, upper_cutoff))
+    # TODO: sometimes, upper_cutoff is Nan: why? To prevent crash, convert to string
+    sys.stderr.write("Removed %d outliers with isize >= %s\n" %
+                     (removed, str(upper_cutoff)))
 
     counts = Counter(list(L-readlength))
     mean = np.mean(L)