From b61350d63260e9b9cf77cf2a2ce7145a9913f3a7 Mon Sep 17 00:00:00 2001
From: Zuhaitz Méndez Fernández de Aránguiz <zuhaitz@debian>
Date: Sat, 31 Jan 2026 01:18:45 +0000
Subject: Fix for concurrency test failure

---
 src/codegen/codegen_utils.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/codegen/codegen_utils.c b/src/codegen/codegen_utils.c
index 8d9cb28..39d1861 100644
--- a/src/codegen/codegen_utils.c
+++ b/src/codegen/codegen_utils.c
@@ -64,6 +64,18 @@ void emit_c_decl(FILE *out, const char *type_str, const char *name)
     }
     else if (generic && (!bracket || generic < bracket))
     {
+        // Special case: Async<T> should NOT be mangled to Async_T
+        // because it compiles to the opaque struct 'Async' (defined in codegen_decl)
+        if (strncmp(type_str, "Async<", 6) == 0)
+        {
+            fprintf(out, "Async %s", name);
+            if (bracket)
+            {
+                fprintf(out, "%s", bracket);
+            }
+            return;
+        }
+
         char *gt = strchr(generic, '>');
         if (gt)
         {
-- 
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