From: "nobu (Nobuyoshi Nakada) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "nobu (Nobuyoshi Nakada)" <noreply@ruby-lang.org>
Subject: [ruby-core:117210] [Ruby master Bug#20344] argument stack underflow (-1)
Date: Mon, 18 Mar 2024 15:37:23 +0000 (UTC) [thread overview]
Message-ID: <redmine.issue-20344.20240318153722.4@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-20344.20240318153722.4@ruby-lang.org
Issue #20344 has been reported by nobu (Nobuyoshi Nakada).
----------------------------------------
Bug #20344: argument stack underflow (-1)
https://bugs.ruby-lang.org/issues/20344
* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Backport: 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED, 3.3: REQUIRED
----------------------------------------
This file produces argument stack underflow, since ruby 2.5.
```ruby
proc do
next if true
case nil
when "a"
next
when "b"
when "c"
proc {}
end
next unless true
end
```
```
-- raw disasm--------
trace: 100
0000 nop ( 1)
<L000> [sp: 0, unremovable: 1, refcnt: 5]
trace: 1
<L004> [sp: 0, unremovable: 0, refcnt: 1]
adjust: [label: 0]
0001 putnil ( 2)
0002 leave ( 13)
<L008> [sp: 1, unremovable: 0, refcnt: 1]
adjust: [label: 0]
0003 putnil ( 6)
0004 leave ( 13)
adjust: [label: 8]
0005 jump <L005> ( 5)
0007 pop ( 7)
0008 jump <L005> ( 7)
* 0010 pop ( 8)
trace: 1
<L011> [sp: -1, unremovable: 1, refcnt: 1]
0011 putself ( 9)
0012 send <calldata:proc, 0>, nil ( 9)
<L012> [sp: -1, unremovable: 0, refcnt: 2]
0015 pop ( 9)
<L005> [sp: 1, unremovable: 0, refcnt: 2]
trace: 1
0016 putnil ( 12)
<L001> [sp: -1, unremovable: 0, refcnt: 3]
trace: 200
0017 leave ( 13)
---------------------
```
--
https://bugs.ruby-lang.org/
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