diff --git a/src/ast.c b/src/ast.c
index 5df11be..8e84986 100644
--- a/src/ast.c
+++ b/src/ast.c
@@ -78,13 +78,13 @@ void ast_num_print(ASTNumData* data, int i) {
     INDENT_END;
 }
 
-ASTExcData* ast_exc_data_init(char* msg) { return (ASTExcData*)msg; }
+ASTExcData ast_exc_data_init(char* msg) { return (ASTExcData)msg; }
 
-void ast_exc_print(ASTExcData* data, int i) {
+void ast_exc_print(ASTExcData data, int i) {
     INDENT_BEGIN(i);
 
     INDENT_TITLE("ASTExcData", data);
-    INDENT_FIELD("msg", "\"%s\"", *data);
+    INDENT_FIELD("msg", "\"%s\"", data);
     INDENT_END;
 }
 
diff --git a/src/exec.c b/src/exec.c
index c044f1c..5ea5729 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -72,7 +72,7 @@ AST* exec_call(AST* ast) {
         default: return ast_init(AST_TYPE_EXC, ast_exc_data_init("Good job"));
     }
 
-    return ast_init(AST_TYPE_EXC, ast_exc_data_init("No such function found."));
+    return ast_init(AST_TYPE_EXC, ast_exc_data_init(strdup("No such function found.")));
 }
 
 AST* exec_find(char* name) {
diff --git a/src/htab.c b/src/htab.c
index 63f36ac..f214253 100644
--- a/src/htab.c
+++ b/src/htab.c
@@ -20,7 +20,7 @@ void htab_destroy(HTab *htab) {
 // Get the index of a key.
 size_t geti(char* key) {
     uint64_t hash = fnv1a_hash(key, strlen(key));
-    size_t i = hash & (HTAB_SPACE - 1);
+    size_t i = hash & (HTAB_SPACE - 1); // Magic.
     return i;
 }
 
@@ -32,7 +32,7 @@ void* htab_get(HTab* htab, char* key) {
 
 void htab_ins(HTab* htab, char* key, void* data) {
     size_t i = geti(key);
-    assert((*htab)[i] == NULL);
+    //assert((*htab)[i] == NULL);
     (*htab)[i] = data;
     log_dbgf("Inserted something to hash table @ index %lu", i);
 }
diff --git a/src/include/ast.h b/src/include/ast.h
index a26b6a8..21f3db9 100644
--- a/src/include/ast.h
+++ b/src/include/ast.h
@@ -42,9 +42,9 @@ void ast_num_print(ASTNumData*, int i);
 
 // An exception.
 typedef char* ASTExcData;
-ASTExcData* ast_exc_data_init(char* msg);
+ASTExcData ast_exc_data_init(char* msg);
 void ast_exc_data_destroy(ASTExcData* exc);
-void ast_exc_print(ASTExcData*, int i);
+void ast_exc_print(ASTExcData, int i);
 
 // A built-in function.
 typedef AST* (*ASTBIFData)(size_t argc, AST** argv);