diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bf1d36..cd70f5f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -122,10 +122,10 @@ if (WITH_SIST2)
 
     target_compile_options(sist2
             PRIVATE
-#            -Ofast
+            -Ofast
 #                    -march=native
-#            -fno-stack-protector
-#            -fomit-frame-pointer
+            -fno-stack-protector
+            -fomit-frame-pointer
             )
 
     TARGET_LINK_LIBRARIES(
diff --git a/src/cli.c b/src/cli.c
index 74fa910..9ed2918 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -126,7 +126,12 @@ int index_args_validate(index_args_t *args, int argc, const char **argv) {
         }
 
         args->script = malloc(info.st_size + 1);
-        read(fd, args->script, info.st_size);
+        res = read(fd, args->script, info.st_size);
+        if (res == -1) {
+            fprintf(stderr, "Error reading script file '%s': %s\n", args->script_path, strerror(errno));
+            return 1;
+        }
+
         *(args->script + info.st_size) = '\0';
         close(fd);
     }