https://www.illumos.org/issues/14937

--- gst-plugins-bad-1.24.9/tests/check/libs/mpegts.c.orig
+++ gst-plugins-bad-1.24.9/tests/check/libs/mpegts.c
@@ -77,7 +77,8 @@
   gboolean supported;
   GIConv test = g_iconv_open ("iso6937", "utf-8");
   supported = (test != (GIConv) - 1);
-  g_iconv_close (test);
+  if (supported)
+    g_iconv_close (test);
   return supported;
 }