Merge changes from github.

PiperOrigin-RevId: 189945839
diff --git a/configure.py b/configure.py
index 97f4675..7d61c2e 100644
--- a/configure.py
+++ b/configure.py
@@ -1048,7 +1048,10 @@
 
     for lib_file in possible_files:
       if is_compatible(lib_file, cuda_ver, cudnn_ver):
-        ver_str = nvinfer_pattern.search(lib_file).group(1)
+        matches = nvinfer_pattern.search(lib_file)
+        if len(matches.groups()) == 0:
+          continue
+        ver_str = matches.group(1)
         ver = convert_version_to_int(ver_str) if len(ver_str) else 0
         if ver > highest_ver[0]:
           highest_ver = [ver, ver_str, lib_file]