From 475836bbb725906e2c938e5dda045a39e462686c Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipensp@gmail.com>
Date: Mon, 21 Apr 2025 21:59:03 -0300
Subject: [PATCH] parser: fix invalid field name checking (fix #24279) (#24283)

---
 vlib/v/parser/struct.v                         | 5 +++++
 vlib/v/parser/tests/invalid_field_name_err.out | 5 +++++
 vlib/v/parser/tests/invalid_field_name_err.vv  | 3 +++
 3 files changed, 13 insertions(+)
 create mode 100644 vlib/v/parser/tests/invalid_field_name_err.out
 create mode 100644 vlib/v/parser/tests/invalid_field_name_err.vv

diff --git a/vlib/v/parser/struct.v b/vlib/v/parser/struct.v
index b2677b0ad..21b2ba4c9 100644
--- a/vlib/v/parser/struct.v
+++ b/vlib/v/parser/struct.v
@@ -218,6 +218,11 @@ fn (mut p Parser) struct_decl(is_anon bool) ast.StructDecl {
 			}
 
 			if is_embed {
+				if p.peek_tok.kind == .dot && p.peek_tok.line_nr == p.peek_token(3).line_nr
+					&& p.peek_token(3).kind == .name {
+					p.error_with_pos('invalid field name', p.tok.pos())
+					return ast.StructDecl{}
+				}
 				// struct embedding
 				type_pos = p.tok.pos()
 				typ = p.parse_type()
diff --git a/vlib/v/parser/tests/invalid_field_name_err.out b/vlib/v/parser/tests/invalid_field_name_err.out
new file mode 100644
index 000000000..4a41fa1bd
--- /dev/null
+++ b/vlib/v/parser/tests/invalid_field_name_err.out
@@ -0,0 +1,5 @@
+vlib/v/parser/tests/invalid_field_name_err.vv:2:2: error: invalid field name
+    1 | struct MyStruct { 
+    2 |     c.close int
+      |     ^
+    3 | }
diff --git a/vlib/v/parser/tests/invalid_field_name_err.vv b/vlib/v/parser/tests/invalid_field_name_err.vv
new file mode 100644
index 000000000..0a696db9a
--- /dev/null
+++ b/vlib/v/parser/tests/invalid_field_name_err.vv
@@ -0,0 +1,3 @@
+struct MyStruct { 
+	c.close int
+}
\ No newline at end of file
-- 
2.39.5