From: "kddnewton (Kevin Newton) via ruby-core" <ruby-core@...>
Date: 2024-06-10T13:52:32+00:00
Subject: [ruby-core:118270] [Ruby master Bug#20571] Compile error on for loop

Issue #20571 has been reported by kddnewton (Kevin Newton).

----------------------------------------
Bug #20571: Compile error on for loop
https://bugs.ruby-lang.org/issues/20571

* Author: kddnewton (Kevin Newton)
* Status: Open
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
```ruby
for _ in 1.5 or _ in []
end
```

raises a compile error for the current compiler only with

```
-- raw disasm--------
   trace: 1
 <L000> [sp: 0, unremovable: 1, refcnt: 1]
   0000 putobject            1.5                                         (   1)
   0002 jump                 <L002>                                      (   1)
 <L006> [sp: 1, unremovable: 1, refcnt: 1]
 <L004> [sp: 1, unremovable: 0, refcnt: 0]
   0004 pop                                                              (   1)
*  0005 pop                                                              (   1)
   0006 putobject            false                                       (   1)
 <L002> [sp: 1, unremovable: 0, refcnt: 1]
   0008 send                 <calldata:each, 0>, nil                     (   1)
 <L001> [sp: -1, unremovable: 0, refcnt: 2]
   0011 leave                                                            (   1)
---------------------
test.rb:1: argument stack underflow (-1)
test.rb: compile error (SyntaxError)
```



-- 
https://bugs.ruby-lang.org/