From c987a1561090032e93c458519091872ce424d182 Mon Sep 17 00:00:00 2001
From: Milan Broz <gmazyland@gmail.com>
Date: Tue, 6 Feb 2024 16:34:47 +0100
Subject: [PATCH] Fix segfault for wrongly specified test on commandline. (#21)

If explicitly specified test does not exist,
dieharder segfaults, for example
  dieharder -d 42
  dieharder -d 5000
---
 dieharder/run_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dieharder/run_test.c b/dieharder/run_test.c
index b6ec195..810427b 100644
--- a/dieharder/run_test.c
+++ b/dieharder/run_test.c
@@ -28,7 +28,7 @@ void run_test()
      }
    }
  }
- if(dtest_num >= 0){
+ if(dtest_num >= 0 && dtest_num < MAXTESTS && dh_test_types[dtest_num]){
    execute_test(dtest_num);
  } else {
    fprintf(stderr,"Error:  dtest_num = %d.  No test found.\n",dtest_num);