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ext/threads/t/problems.t crashes in 5.8.4

From:
Jan Dubois
Date:
May 20, 2004 08:44
Subject:
ext/threads/t/problems.t crashes in 5.8.4
Message ID:
200405201543.i4KFhkaI006942@smtp3.ActiveState.com
This happens only on a single Windows 2000 (SP4) machine here, and only while
running as part of the full harness.  When I run the test manually, it passes,
just as the full test passes on the other Windows 2000 machines.

The stack trace looks like this (transscribed from a screenshot, but hopefully
without errors):

  S_hfreeentries
  Perl_hv_undef
  Perl_sv_clear
  Perl_sv_free
  do_clean_all
  S_visit
  Perl_sv_clean_all
  perl_destruct 
  RunPerl
  main

The error occurs during the assignment

    entry = array[0];

I cannot access the array variable in the debugger because the optimizer has
put it into a register, but hv itself is 0 at that time.  So it looks like a
race condition because S_hfreeentries explicitly guards against this.  Any
ideas how this could be happening?

Cheers,
-Jan

Summary of my perl5 (revision 5 version 8 subversion 4) configuration:
  Platform:
    osname=MSWin32, osvers=4.0, archname=MSWin32-x86-multi-thread
    uname=''
    config_args='undef'
    hint=recommended, useposix=true, d_sigaction=undef
    usethreads=undef use5005threads=undef useithreads=define
usemultiplicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cl', ccflags ='-nologo -Gf -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE
-DNO_STRICT -DHAVE_DES_FCRYPT  -DNO_HASH_SEED -DPERL_IMPLICIT_CONTEXT
-DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_READFIX',
    optimize='-MD -Zi -DNDEBUG -O1',
    cppflags='-DWIN32'
    ccversion='', gccversion='', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=undef, longlongsize=8, d_longdbl=define, longdblsize=10
    ivtype='long', ivsize=4, 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
-libpath:"C:\builds\build-20040519T212352-bbkofvuant\ActivePerl\Perl\lib\CORE"
-machine:x86'
    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 wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.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 wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib
msvcrt.lib
    libc=msvcrt.lib, so=dll, useshrplib=yes, libperl=perl58.lib
    gnulibc_version='undef'
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-dll -nologo -nodefaultlib -debug -opt:ref,icf
-libpath:"C:\builds\build-20040519T212352-bbkofvuant\ActivePerl\Perl\lib\CORE"
-machine:x86'


Characteristics of this binary (from libperl): 
  Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES
PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS
  Locally applied patches:
  	ActivePerl Build 810
  	22751 Update to Test.pm 1.25
  	21540 Fix backward-compatibility issues in if.pm
  Built under MSWin32
  Compiled at May 19 2004 21:37:06
  %ENV:
    PERLDB_OPTS="RemotePort=127.0.0.1:2000"
  @INC:
    C:/builds/build-20040519T212352-bbkofvuant/perl/lib
    .





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