From 942a1dd786aff5e678cf7d0d3648971d0190ea31 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Thu, 26 Feb 2026 11:22:40 +0300
Subject: [PATCH] parser: fix compiler does not infer field type and raise
 inappropriate error when initializing struct (fixes #14762)

---
 vlib/v/parser/struct.v                         | 10 ++++++++++
 ..._init_array_field_with_curly_braces_err.out |  7 +++++++
 ...t_init_array_field_with_curly_braces_err.vv | 18 ++++++++++++++++++
 3 files changed, 35 insertions(+)
 create mode 100644 vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.out
 create mode 100644 vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.vv

diff --git a/vlib/v/parser/struct.v b/vlib/v/parser/struct.v
index 0ae449fea..37737528d 100644
--- a/vlib/v/parser/struct.v
+++ b/vlib/v/parser/struct.v
@@ -649,6 +649,16 @@ fn (mut p Parser) struct_init(typ_str string, kind ast.StructInitKind, is_option
 				}
 			}
 			p.check(.colon)
+			if p.tok.kind == .lcbr && typ != ast.void_type {
+				struct_sym := p.table.final_sym(p.table.unaliased_type(typ))
+				if field := struct_sym.find_field(field_name) {
+					field_sym := p.table.final_sym(p.table.unaliased_type(field.typ))
+					if field_sym.kind in [.array, .array_fixed] {
+						p.error_with_pos('cannot use `{}` for array field `${field_name}`; use `[]` instead',
+							p.tok.pos())
+					}
+				}
+			}
 			expr = p.expr(0)
 			end_comments = p.eat_comments(same_line: true)
 			last_field_pos := expr.pos()
diff --git a/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.out b/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.out
new file mode 100644
index 000000000..7e62a99d5
--- /dev/null
+++ b/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.out
@@ -0,0 +1,7 @@
+vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.vv:13:9: error: cannot use `{}` for array field `foos`; use `[]` instead
+   11 | fn main() {
+   12 |     _ := Bar{
+   13 |         foos: {
+      |               ^
+   14 |             new_foo()
+   15 |             new_foo()
diff --git a/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.vv b/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.vv
new file mode 100644
index 000000000..3e53df339
--- /dev/null
+++ b/vlib/v/parser/tests/struct_init_array_field_with_curly_braces_err.vv
@@ -0,0 +1,18 @@
+struct Foo {}
+
+fn new_foo() Foo {
+	return Foo{}
+}
+
+struct Bar {
+	foos []Foo
+}
+
+fn main() {
+	_ := Bar{
+		foos: {
+			new_foo()
+			new_foo()
+		}
+	}
+}
-- 
2.39.5