Index: tool/lemon.c
==================================================================
--- tool/lemon.c
+++ tool/lemon.c
@@ -2853,10 +2853,11 @@
   filesize = ftell(fp);
   rewind(fp);
   filebuf = (char *)malloc( filesize+1 );
   if( filesize>100000000 || filebuf==0 ){
     ErrorMsg(ps.filename,0,"Input file too large.");
+    free(filebuf);
     gp->errorcnt++;
     fclose(fp);
     return;
   }
   if( fread(filebuf,1,filesize,fp)!=filesize ){