checker: handle `a[i] or { statements expr }` the same as the other or blocks

vlib/v/checker/checker.v

@@ -1940,6 +1940,10 @@ pub fn (mut c Checker) check_expr_opt_call(expr ast.Expr, ret_type table.Type) t
 			c.error('unexpected `?`, the function `$expr.name` does not return an optional',
 				expr.or_block.pos)
 		}
+	} else if expr is ast.IndexExpr {
+		if expr.or_expr.kind != .absent {
+			c.check_or_expr(expr.or_expr, ret_type, ret_type)
+		}
 	}
 	return ret_type
 }

vlib/v/tests/array_map_or_test.v

@@ -3,25 +3,33 @@ fn test_array_or() {
 	mut testvar := 17
 	el := m[4] or {
 		testvar = -43
+		999
 	}
 	good := m[1] or {
 		testvar = 11
+		0
 	}
 	assert testvar == -43
-	assert el == 0
+	assert el == 999
 	assert good == 4
 }
 
 fn test_map_or() {
-	m := {'as': 3, 'qw': 4, 'kl': 5}
+	m := {
+		'as': 3
+		'qw': 4
+		'kl': 5
+	}
 	mut testvar := -21
 	el := m['pp'] or {
 		testvar = 7931
+		7
 	}
 	good := m['kl'] or {
 		testvar = -45
+		999
 	}
 	assert testvar == 7931
-	assert el == 0
+	assert el == 7
 	assert good == 5
 }