fixing linked list behavior

2 files changed, 10 insertions, 3 deletions

diff --git a/src/common.cc b/src/common.cc
index 5e84c01..12fe710 100644
--- a/src/common.cc
+++ b/src/common.cc
@@ -103,6 +103,8 @@ struct Link {
 static inline void link_after(Link* prev, Link* nlink) {
   assert_neq(prev, nullptr);
   assert_neq(nlink, nullptr);
+  assert_neq(prev, nlink);
+  assert(nlink->prev == nullptr && nlink->next == nullptr);
 
   Link* next = prev->next;
 
diff --git a/src/voidc.cc b/src/voidc.cc
index 63d2ef7..c6682b2 100644
--- a/src/voidc.cc
+++ b/src/voidc.cc
@@ -23,13 +23,18 @@ int main() {
   String file(SOURCE_FILE);
 
   Buffer_Stack stack{};
-  Buffer* buffer = nullptr;
+  Buffer* buffer1 = nullptr;
+  Buffer* buffer2 = nullptr;
 
-  bool ret = buffer_init(heap_allocator(), &source, &file, &buffer);
+  bool ret = buffer_init(heap_allocator(), &source, &file, &buffer1);
   if (!ret) return EXIT_FAILURE;
 
-  buffer_stack_push(&stack, buffer);
+  ret = buffer_init(heap_allocator(), &source, &file, &buffer2);
+  if (!ret) return EXIT_FAILURE;
 
+  buffer_stack_push(&stack, buffer1);
+  buffer_stack_push(&stack, buffer2);
+  
   Tokenizer tokenizer(&stack);
 
   Token token = {};