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[perl #108590] :encoding(*) IOLayers are thread-hostile when applied to STDIN

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From:
pm . 20 . browseruk @ xoxy . net
Date:
January 18, 2012 17:22
Subject:
[perl #108590] :encoding(*) IOLayers are thread-hostile when applied to STDIN
Message ID:
rt-3.6.HEAD-14510-1326932349-1378.108590-75-0@perl.org
# New Ticket Created by  pm.20.browseruk@xoxy.net 
# Please include the string:  [perl #108590]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=108590 >



This is a bug report for perl from pm.20.browseruk@xoxy.net,
generated with the help of perlbug 1.39 running under perl 5.10.1.


-----------------------------------------------------------------
[Please describe your issue here]

As is, the following code cause a segfault:

#! perl -slw
use strict;
use threads;

binmode STDIN, ':encoding(UTF-8)';
#binmode STDIN, ':raw';

async{ sleep 10; }->detach;

my $in = <STDIN>;

Use binmode with any :encoding(*) on STDIN and it traps.
Comment out either the uncommented binmode or the async lines and it no  
longer traps.
Comment out the encoding binmode and uncomment the :raw binmode and it no  
longer traps.
Comment out both binmodes and run with -CI on the command line and it no  
longer traps.

Hence the conclusion that it is the Unicode IOlayers that are thread  
hostile.

Also known to occur on linux systems.

[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
     category=core
     severity=critical
---
Site configuration information for perl 5.10.1:

Configured by sshd_server at Wed Jan 27 14:12:08 2010.

Summary of my perl5 (revision 5 version 10 subversion 1) configuration:

   Platform:
     osname=MSWin32, osvers=5.2, archname=MSWin32-x64-multi-thread
     uname=''
     config_args='undef'
     hint=recommended, useposix=true, d_sigaction=undef
     useithreads=define, usemultiplicity=define
     useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
     use64bitint=define, use64bitall=undef, uselongdouble=undef
     usemymalloc=n, bincompat5005=undef
   Compiler:
     cc='cl', ccflags ='-nologo -GF -W3 -MD -Zi -DNDEBUG -Ox -GL -Wp64  
-fp:precise -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DWIN64  
-DCONSERVATIVE -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC  
-DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO  
-DPERL_MSVCRT_READFIX',
     optimize='-MD -Zi -DNDEBUG -Ox -GL -Wp64 -fp:precise',
     cppflags='-DWIN32'
     ccversion='15.0.21022', gccversion='', gccosandvers=''
     intsize=4, longsize=4, ptrsize=8, doublesize=8, byteorder=12345678
     d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=8
     ivtype='__int64', ivsize=8, nvtype='double', nvsize=8,  
Off_t='__int64', lseeksize=8
     alignbytes=8, prototype=define
   Linker and Libraries:
     ld='link', ldflags ='-nologo -nodefaultlib -debug -opt:ref,icf -ltcg   
-libpath:"C:\Perl64\lib\CORE"  -machine:AMD64'
     libpth=\lib
     libs=  oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib   
comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib  
uuid.lib ws2_32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib  
comctl32.lib bufferoverflowU.lib msvcrt.lib
     perllibs=  oldnames.lib kernel32.lib user32.lib gdi32.lib  
winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib  
oleaut32.lib  netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib   
version.lib odbc32.lib odbccp32.lib comctl32.lib bufferoverflowU.lib  
msvcrt.lib
     libc=msvcrt.lib, so=dll, useshrplib=true, libperl=perl510.lib
     gnulibc_version=''
   Dynamic Linking:
     dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
     cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -debug  
-opt:ref,icf -ltcg  -libpath:"C:\Perl64\lib\CORE"  -machine:AMD64'

Locally applied patches:
     ACTIVEPERL_LOCAL_PATCHES_ENTRY
     0abd0d disable non-unicode case insensitive trie matching

---
@INC for perl 5.10.1:
     C:/Perl64/site/lib
     C:/Perl64/lib
     .

---
Environment for perl 5.10.1:
     HOME (unset)
     LANG (unset)
     LANGUAGE (unset)
     LD_LIBRARY_PATH (unset)
     LOGDIR (unset)
     PATH=c:\Program Files (x86)\Microsoft Visual Studio  
9.0\VC\Bin\amd64;c:\Program Files (x86)\Microsoft Visual Studio  
9.0\VC\vcpackages;c:\Program Files (x86)\Microsoft Visual Studio  
9.0\Common7\IDE;C:\Program Files\Microsoft  
SDKs\Windows\v6.1\Bin\x64;C:\Program Files\Microsoft  
SDKs\Windows\v6.1\Bin;C:\Windows\Microsoft.NET\Framework64\v3.5;C:\Windows\Microsoft.NET\Framework\v3.5;C:\Windows\Microsoft.NET\Framework64\v2.0.50727;C:\Windows\Microsoft.NET\Framework\v2.0.50727;C:\Perl64\site\bin;C:\Perl64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program  
Files  
(x86)\AMD\CodeAnalyst\bin;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\lcc\bin
     PERL_BADLANG (unset)
     SHELL (unset)


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