diff -ruNp a/src/run-as-child.c b/src/run-as-child.c

--- a/src/run-as-child.c	2021-10-14 08:17:04.556107815 +0200

+++ b/src/run-as-child.c	2021-10-14 08:36:23.686706344 +0200

@@ -98,8 +98,14 @@ int exec_as_func(int flags, void *ptr)

 			/* Create single string with all command line options. */

 			int ii = 1;

 			char *opt = strdup(":");

+            char *tempOpt;

 			while (opt != NULL && arg[ii] != NULL) {

-				opt = realloc(opt, strlen(opt) + strlen(arg[ii]) + 2);

+				tempOpt = realloc(opt, strlen(opt) + strlen(arg[ii]) + 2);

+                if (tempOpt != NULL){

+                    opt = tempOpt;

+                } else {

+                    break;

+                }

 				opt = strcat(opt, " ");

 				opt = strcat(opt, arg[ii]);

 				ii++;