weird C extension bug from Ruby 2.0.0-p0

weird C extension bug from Ruby 2.0.0-p0

[Eric Wong]

I'm stumped that rb_str_modify() doesn't seem to help with
rb_str_set_len() raising in the chunked parser.  More info here:

https://bugs.ruby-lang.org/issues/7957

Any help would be appreciated... It's way past my bed time.
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[PATCH] http: avoid frozen string bug in filter_body

[Eric Wong]

Eric Wong <normalperson@yhbt.net> wrote:
> I'm stumped that rb_str_modify() doesn't seem to help with
> rb_str_set_len() raising in the chunked parser.  More info here:
> 
> https://bugs.ruby-lang.org/issues/7957
> 
> Any help would be appreciated... It's way past my bed time.

Oops, my fault from 2010 and 2009.  v4.6.2 coming

>From f7ee06592d7709e96f64efb5e7a9485b54415c9d Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Tue, 26 Feb 2013 02:52:37 +0000
Subject: [PATCH] http: avoid frozen string bug in filter_body

Our rb_str_modify() became no-ops due to incomplete reverts
of workarounds for old Rubinius, causing rb_str_set_len to
fail with: can't set length of shared string (RuntimeError)

This bug was introduced due to improper workarounds for old
versions of Rubinius in 2009 and 2010:

commit 5e8979ad38efdc4de3a69cc53aea33710d478406
("http: cleanups for latest Rubinius")
commit f37c23704cb73d57e9e478295d1641df1d9104c7
("http: no-op rb_str_modify() for Rubies without it")
---
 ext/unicorn_http/ext_help.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/ext/unicorn_http/ext_help.h b/ext/unicorn_http/ext_help.h
index 0968080..c87c272 100644
--- a/ext/unicorn_http/ext_help.h
+++ b/ext/unicorn_http/ext_help.h
@@ -52,10 +52,6 @@ static void rb_18_str_set_len(VALUE str, long len)
 #  endif
 #endif /* ! defined(NUM2SIZET) */
 
-#ifndef HAVE_RB_STR_MODIFY
-#  define rb_str_modify(x) do {} while (0)
-#endif /* ! defined(HAVE_RB_STR_MODIFY) */
-
 static inline int str_cstr_eq(VALUE val, const char *ptr, long len)
 {
   return (RSTRING_LEN(val) == len && !memcmp(ptr, RSTRING_PTR(val), len));
-- 
Eric Wong
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