fixed white space invalid free (#6)

* fixed white space

* Update parser.c

---------

Co-authored-by: Chandra Irugalbandara <[email protected]>

Author: mateusmoutinho

src/core/parser.c

@@ -22,32 +22,34 @@ ParsedCommand *parse_command(char *input) {
     char *input_copy = strdup(input);
     if (!input_copy) return NULL;
 
+    char *original_input_copy = input_copy;
     input_copy = trim_whitespace(input_copy);
     if (strlen(input_copy) == 0) {
         PARSER_DEBUG("Empty command after trimming");
-        free(input_copy);
+        free(original_input_copy);
+        original_input_copy = NULL;
         return NULL;
     }
 
     ParsedCommand *cmd = calloc(1, sizeof(ParsedCommand));
     if (!cmd) {
         PARSER_DEBUG("Failed to allocate ParsedCommand");
-        free(input_copy);
+        free(original_input_copy);
+        original_input_copy = NULL;
         return NULL;
     }
 
     // Use calloc to ensure all entries are initialized to NULL
     cmd->args = calloc(MAX_ARGS, sizeof(char *));
     if (!cmd->args) {
         PARSER_DEBUG("Failed to allocate args array");
-        free(input_copy);
+        free(original_input_copy);
+        original_input_copy = NULL;
         free(cmd);
         return NULL;
     }
-    
     int arg_count = 0;
     char *token, *saveptr = NULL;
-    
     // Tokenize and process input
     token = strtok_r(input_copy, " \t", &saveptr);
     while (token != NULL && arg_count < MAX_ARGS - 1) {
@@ -81,13 +83,17 @@ ParsedCommand *parse_command(char *input) {
         // Get next token
         token = strtok_r(NULL, " \t", &saveptr);
     }
-    
     // Ensure NULL termination
     cmd->args[arg_count] = NULL;
 
     PARSER_DEBUG("Command parsed with %d arguments", arg_count);
-    
-    free(input_copy);
+
+    if(original_input_copy){
+        free(original_input_copy);
+        original_input_copy = NULL;
+    }
+
+
     return cmd;
 }
 
@@ -103,4 +109,4 @@ void free_parsed_command(ParsedCommand *cmd) {
     free(cmd->input_file);
     free(cmd->output_file);
     free(cmd);
-}
+}