--- singular-4.2.0/Singular/extra.cc.orig	2021-04-14 06:26:53.000000000 -0600
+++ singular-4.2.0/Singular/extra.cc	2021-05-25 19:54:51.313284051 -0600
@@ -2438,7 +2438,7 @@ static BOOLEAN jjEXTENDED_SYSTEM(leftv r
         if(strcmp(sys_cmd,"changeRing")==0)
         {
           int varN = currRing->N;
-          char h[10];
+          char h[12];
           for (int i = 1; i <= varN; i++)
           {
             omFree(currRing->names[i - 1]);