From 34d9790f14a5926b0f416d42c3297e98b407570b Mon Sep 17 00:00:00 2001
From: Swastik Baranwal <swstkbaranwal@gmail.com>
Date: Sat, 22 Nov 2025 13:06:34 +0530
Subject: [PATCH] parser: disallow generic function to be exported (fix #25794)
 (#25806)

---
 vlib/v/parser/fn.v                            | 8 ++++++++
 vlib/v/parser/tests/generic_fn_export_err.out | 5 +++++
 vlib/v/parser/tests/generic_fn_export_err.vv  | 4 ++++
 3 files changed, 17 insertions(+)
 create mode 100644 vlib/v/parser/tests/generic_fn_export_err.out
 create mode 100644 vlib/v/parser/tests/generic_fn_export_err.vv

diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index 580531e34..44a7b2817 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -473,6 +473,14 @@ fn (mut p Parser) fn_decl() ast.FnDecl {
 			}
 		}
 	}
+	if generic_names.len > 0 {
+		for fna in fn_attrs {
+			if fna.name == 'export' {
+				p.error_with_pos('generic functions cannot be exported', fna.pos)
+				break
+			}
+		}
+	}
 	// Params
 	params_t, are_params_type_only, mut is_variadic, mut is_c_variadic := p.fn_params()
 	if is_c2v_variadic {
diff --git a/vlib/v/parser/tests/generic_fn_export_err.out b/vlib/v/parser/tests/generic_fn_export_err.out
new file mode 100644
index 000000000..c69b16000
--- /dev/null
+++ b/vlib/v/parser/tests/generic_fn_export_err.out
@@ -0,0 +1,5 @@
+vlib/v/parser/tests/generic_fn_export_err.vv:1:1: error: generic functions cannot be exported
+    1 | @[export: "sort_array"]
+      | ~~~~~~~~~~~~~~~~~~~~~~~
+    2 | pub fn sort_array[T](mut arr []T) {
+    3 |     arr.sort(|a, b| a < b)
diff --git a/vlib/v/parser/tests/generic_fn_export_err.vv b/vlib/v/parser/tests/generic_fn_export_err.vv
new file mode 100644
index 000000000..f3b25ace0
--- /dev/null
+++ b/vlib/v/parser/tests/generic_fn_export_err.vv
@@ -0,0 +1,4 @@
+@[export: "sort_array"]
+pub fn sort_array[T](mut arr []T) {
+	arr.sort(|a, b| a < b)
+}
-- 
2.39.5