--- src/frontend/cmd.cc	2021-04-04 23:20:06.720388661 -0400

+++ src/frontend/cmd.cc	2021-04-04 23:14:35.095359251 -0400

@@ -480,8 +480,13 @@

   strcpy( data, "setboard " );

   int i=0;

   while ( epdline[i] != '\n' ) {

-    data[i+9] = epdline[i];

-    ++i;

+    if ((i + 9) < MAXSTR - 1) {

+        data[i+9] = epdline[i];

+        ++i;

+    } else {

+        printf(_("Error reading contents of file '%s'.\n"), token[1]);

+        break;

+    }

   }

   data[i+9] = '\0';

   SetDataToEngine( data );

@@ -504,8 +509,13 @@

   strcpy( data, "setboard " );

   int i=0;

   while ( epdline[i] != '\n' ) {

-    data[i+9] = epdline[i];

-    ++i;

+    if ((i + 9) < MAXSTR - 1) {

+        data[i+9] = epdline[i];

+        ++i;

+    } else {

+        printf(_("Error reading contents of file '%s'.\n"), token[1]);

+        break;

+    }

   }

   data[i+9] = '\0';