From 0c896fcdf9ebde870ead2dcee9a82e135554c28d Mon Sep 17 00:00:00 2001
From: Dana Robinson <derobins@hdfgroup.org>
Date: Mon, 29 Apr 2019 14:50:13 -0700
Subject: Missed an env check before strcmp.

---
 test/h5test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/h5test.c b/test/h5test.c
index dba8cf7..59ccfe4 100644
--- a/test/h5test.c
+++ b/test/h5test.c
@@ -610,7 +610,7 @@ h5_fixname_real(const char *base_name, hid_t fapl, const char *_suffix,
                 if(!env)
                     env = HDF5_DRIVER;
 #endif
-                if(!HDstrcmp(env, "split")) {
+                if(env && !HDstrcmp(env, "split")) {
                     /* split VFD */
                     if(subst_for_superblock)
                         suffix = "-m.h5";
-- 
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