parser: warn on missing for loop payload, recover from invalid global error set access

lib/std/zig/parser_test.zig

@@ -4215,6 +4215,8 @@ test "recovery: invalid global error set access" {
         \\}
     , &[_]Error{
         .expected_token,
+        .expected_token,
+        .invalid_and,
     });
 }
 
@@ -4273,6 +4275,20 @@ test "recovery: missing block after for/while loops" {
     });
 }
 
+test "recovery: missing for payload" {
+    try testError(
+        \\comptime {
+        \\    const a = for(a) {};
+        \\    const a: for(a) {};
+        \\    for(a) {}
+        \\}
+    , &[_]Error{
+        .expected_loop_payload,
+        .expected_loop_payload,
+        .expected_loop_payload,
+    });
+}
+
 const std = @import("std");
 const mem = std.mem;
 const warn = std.debug.warn;