parser: disallow [3]!int{} (fix #26244) (#26249)

Author: Delta456

vlib/v/parser/checks.v

@@ -73,7 +73,7 @@ fn (p &Parser) is_array_type() bool {
 		if tok.kind in [.name, .amp] {
 			return true
 		}
-		if tok.kind == .eof {
+		if tok.kind in [.eof, .colon, .dot] {
 			break
 		}
 		i++

vlib/v/parser/containers.v

@@ -119,7 +119,11 @@ fn (mut p Parser) array_init(is_option bool, alias_array_type ast.Type) ast.Arra
 					last_pos = p.tok.pos()
 					is_fixed = true
 					has_val = true
-					p.next()
+					if exprs.len == 1 && p.tok.line_nr == line_nr && p.is_array_type() {
+						p.error('fixed arrays do not support storing Result values')
+					} else {
+						p.next()
+					}
 				}
 				if p.tok.kind == .not && p.tok.line_nr == p.prev_tok.line_nr {
 					last_pos = p.tok.pos()

vlib/v/parser/tests/fixed_array_init_result_err.out

@@ -0,0 +1,3 @@
+vlib/v/parser/tests/fixed_array_init_result_err.vv:1:8: error: fixed arrays do not support storing Result values
+    1 | _ = [3]!int{}
+      |        ^

vlib/v/parser/tests/fixed_array_init_result_err.vv

@@ -0,0 +1 @@
+_ = [3]!int{}