5 files changed, 20 insertions, 31 deletions

diff --git a/src/analysis/typecheck.c b/src/analysis/typecheck.c
index a0a2df1..e83bb4b 100644
--- a/src/analysis/typecheck.c
+++ b/src/analysis/typecheck.c
@@ -15,6 +15,7 @@ static void tc_error(TypeChecker *tc, Token t, const char *msg)
 static void tc_enter_scope(TypeChecker *tc)
 {
     Scope *s = malloc(sizeof(Scope));
+    if (!s) return;
     s->symbols = NULL;
     s->parent = tc->current_scope;
     tc->current_scope = s;
diff --git a/src/codegen/codegen_main.c b/src/codegen/codegen_main.c
index 61269ef..6e66bcb 100644
--- a/src/codegen/codegen_main.c
+++ b/src/codegen/codegen_main.c
@@ -458,15 +458,15 @@ void codegen_node(ParserContext *ctx, ASTNode *node, FILE *out)
 
         if (ctx->parsed_globals_list)
         {
-            StructRef *s = ctx->parsed_globals_list;
-            while (s)
+            StructRef *struct_ref = ctx->parsed_globals_list;
+            while (struct_ref)
             {
                 ASTNode *copy = xmalloc(sizeof(ASTNode));
-                *copy = *s->node;
+                *copy = *struct_ref->node;
                 copy->next = merged_globals;
                 merged_globals = copy;
 
-                s = s->next;
+                struct_ref = struct_ref->next;
             }
         }
 
@@ -477,11 +477,11 @@ void codegen_node(ParserContext *ctx, ASTNode *node, FILE *out)
 
         if (ctx->instantiated_funcs)
         {
-            ASTNode *s = ctx->instantiated_funcs;
-            while (s)
+            ASTNode *fn_node = ctx->instantiated_funcs;
+            while (fn_node)
             {
                 ASTNode *copy = xmalloc(sizeof(ASTNode));
-                *copy = *s;
+                *copy = *fn_node;
                 copy->next = NULL;
                 if (!merged_funcs)
                 {
@@ -493,17 +493,17 @@ void codegen_node(ParserContext *ctx, ASTNode *node, FILE *out)
                     merged_funcs_tail->next = copy;
                     merged_funcs_tail = copy;
                 }
-                s = s->next;
+                fn_node = fn_node->next;
             }
         }
 
         if (ctx->parsed_funcs_list)
         {
-            StructRef *s = ctx->parsed_funcs_list;
-            while (s)
+            StructRef *fn_ref = ctx->parsed_funcs_list;
+            while (fn_ref)
             {
                 ASTNode *copy = xmalloc(sizeof(ASTNode));
-                *copy = *s->node;
+                *copy = *fn_ref->node;
                 copy->next = NULL;
                 if (!merged_funcs)
                 {
@@ -515,17 +515,17 @@ void codegen_node(ParserContext *ctx, ASTNode *node, FILE *out)
                     merged_funcs_tail->next = copy;
                     merged_funcs_tail = copy;
                 }
-                s = s->next;
+                fn_ref = fn_ref->next;
             }
         }
 
         if (ctx->parsed_impls_list)
         {
-            StructRef *s = ctx->parsed_impls_list;
-            while (s)
+            StructRef *impl_ref = ctx->parsed_impls_list;
+            while (impl_ref)
             {
                 ASTNode *copy = xmalloc(sizeof(ASTNode));
-                *copy = *s->node;
+                *copy = *impl_ref->node;
                 copy->next = NULL;
                 if (!merged_funcs)
                 {
@@ -537,7 +537,7 @@ void codegen_node(ParserContext *ctx, ASTNode *node, FILE *out)
                     merged_funcs_tail->next = copy;
                     merged_funcs_tail = copy;
                 }
-                s = s->next;
+                impl_ref = impl_ref->next;
             }
         }
 
diff --git a/src/codegen/codegen_stmt.c b/src/codegen/codegen_stmt.c
index cba55b4..43e5bb5 100644
--- a/src/codegen/codegen_stmt.c
+++ b/src/codegen/codegen_stmt.c
@@ -70,21 +70,9 @@ static void emit_single_pattern_cond(const char *pat, int id, int is_ptr, FILE *
             fprintf(out, "strcmp(_m_%d, %s) == 0", id, pat);
         }
     }
-    else if (pat[0] == '\'')
-    {
-        // Char literal pattern
-        if (is_ptr)
-        {
-            fprintf(out, "*_m_%d == %s", id, pat);
-        }
-        else
-        {
-            fprintf(out, "_m_%d == %s", id, pat);
-        }
-    }
     else
     {
-        // Numeric or simple pattern
+        // Numeric, Char literal (removed duplicate branch), or simple pattern
         if (is_ptr)
         {
             fprintf(out, "*_m_%d == %s", id, pat);
diff --git a/src/lsp/json_rpc.c b/src/lsp/json_rpc.c
index 9baf33e..ffb5d1f 100644
--- a/src/lsp/json_rpc.c
+++ b/src/lsp/json_rpc.c
@@ -114,7 +114,7 @@ void handle_request(const char *json_str)
             "\"signatureHelpProvider\":{\"triggerCharacters\":[\"(\"]},"
             "\"completionProvider\":{"
             "\"triggerCharacters\":[\".\"]}}}}";
-        fprintf(stdout, "Content-Length: %ld\r\n\r\n%s", strlen(response), response);
+        fprintf(stdout, "Content-Length: %zu\r\n\r\n%s", strlen(response), response);
         fflush(stdout);
     }
     else if (strcmp(method, "textDocument/didOpen") == 0 ||
diff --git a/src/lsp/lsp_analysis.c b/src/lsp/lsp_analysis.c
index 2a07990..088bede 100644
--- a/src/lsp/lsp_analysis.c
+++ b/src/lsp/lsp_analysis.c
@@ -26,7 +26,7 @@ static void send_json_response(cJSON *root)
     char *str = cJSON_PrintUnformatted(root);
     if (str)
     {
-        fprintf(stdout, "Content-Length: %ld\r\n\r\n%s", strlen(str), str);
+        fprintf(stdout, "Content-Length: %zu\r\n\r\n%s", strlen(str), str);
         fflush(stdout);
         free(str);
     }