diff --git a/src/builtin/builtin_manager.c b/src/builtin/builtin_manager.c
index 542be28..a02c035 100644
--- a/src/builtin/builtin_manager.c
+++ b/src/builtin/builtin_manager.c
@@ -47,9 +47,9 @@ int builtin_cd(char **argv, env_t *env)
     char *old = getcwd(NULL, 0);
 
     if (get_argc(argv) > 2) {
-        write(2, "cd: Too many arguments.\n", 25);
+        dprintf(2, "cd: Too many arguments.\n");
         env->vars = my_setenv(env->vars, "?", "1");
-        return (0);
+        return (-1 * !env->window);
     }
     env->vars = my_setenv(env->vars, "?", "0");
     if (!argv[1])
@@ -59,6 +59,7 @@ int builtin_cd(char **argv, env_t *env)
     if (chdir(path) < 0) {
         printf("%s: %s.\n", path, strerror(errno));
         env->vars = my_setenv(env->vars, "?", "1");
+        return (-1 * !env->window);
     } else
         env->env = my_setenv(env->env, "OLDPWD", old);
     free(old);
diff --git a/src/parser/parser.c b/src/parser/parser.c
index 75f6d1e..6a1a6df 100644
--- a/src/parser/parser.c
+++ b/src/parser/parser.c
@@ -18,6 +18,7 @@
 #include <malloc.h>
 
 char *strdup(const char *);
+int dprintf(int, const char *, ...);
 
 int count_trailing_spaces(char *cmd)
 {
@@ -42,6 +43,7 @@ char **remove_leading_entries(char **cmds)
 char *process_aliases(char *cmd, env_t *env)
 {
     int bin_len;
+    int len;
 
     for (bin_len = 0; cmd[bin_len]; bin_len++) {
         if (cmd[bin_len] == ' ' || cmd[bin_len] == '\t')
@@ -49,10 +51,11 @@ char *process_aliases(char *cmd, env_t *env)
     }
     for (alias_t *al = env->alias; al; al = al->next) {
         if (!strncmp(al->alias, cmd, bin_len)) {
-            cmd = realloc(cmd, strlen(cmd) + strlen(al->command) + 1 - bin_len);
+            len = strlen(cmd) + strlen(al->command) + 1 - bin_len;
+            rm_n_char(cmd, bin_len);
+            cmd = realloc(cmd, len);
             if (!cmd)
                 return (NULL);
-            rm_n_char(cmd, bin_len);
             insert_substring(cmd, al->command, 1);
         }
     }
@@ -66,8 +69,17 @@ char **parse_input(char *cmd, env_t *env, wordexp_t *parser)
     if (!(cmd = process_vars(cmd, env)))
         return (NULL);
     cmd = process_aliases(cmd, env);
-    if (wordexp(cmd, parser, WRDE_SHOWERR)) {
-        perror(SHELL_NAME);
+    switch (wordexp(cmd, parser, WRDE_SHOWERR)) {
+    case 0:
+        break;
+    case WRDE_BADCHAR:
+        dprintf(2, "Illegal occurrence of one of |, &, ;, <, >, (, ), {, }.\n");
+        return (NULL);
+    case WRDE_SYNTAX:
+        dprintf(2, "Shell syntax error\n");
+        return (NULL);
+    default:
+        dprintf(2, "Unknonw parsing error.\n");
         return (NULL);
     }
     free(cmd);
diff --git a/tests/tester/tests b/tests/tester/tests
index d7f5d86..bda695b 100644
--- a/tests/tester/tests
+++ b/tests/tester/tests
@@ -289,16 +289,6 @@ TESTS=
   echo 'echo "$"'
 [928-END]
 
-[929]
-NAME="929"
-SETUP=""
-CLEAN=""
-TESTS=
-  echo 'echo "\t"'
-  echo 'echo $'
-  echo 'echo $?'
-[929-END]
-
 [930]
 NAME="930"
 SETUP=""