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Memory leak in perl 5.24.0 when use re qw[strict] is used

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From:
zdm@softvisio.net
Date:
June 3, 2016 10:06
Subject:
Memory leak in perl 5.24.0 when use re qw[strict] is used
Message ID:
21fe0491-6b09-c901-febc-a2b162423fe6@softvisio.net
Hi.

This code produce memory leak:

use re qw[strict];
my $s = 'aaa';
while (1) {
    my $ps = 'aa';
    $s =~ /[^.]+\.$ps\z/sm;
}

If I remove "use re qw[strict];" - mem. leak disappearing.

-------------------------
Summary of my perl5 (revision 5 version 24 subversion 0) configuration:

  Platform:
    osname=MSWin32, osvers=6.3, archname=MSWin32-x64-multi-thread
    uname='Win32 strawberry-perl 5.24.0.1 #1 Tue May 10 21:30:49 2016 x64'
    config_args='undef'
    hint=recommended, useposix=true, d_sigaction=undef
    useithreads=define, usemultiplicity=define
    use64bitint=define, use64bitall=undef, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags =' -s -O2 -DWIN32 -DWIN64 -DCONSERVATIVE
-DPERL_TEXTMODE_SCRIPTS -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS
-fwrapv -fno-strict-aliasing -mms-bitfields',
    optimize='-s -O2',
    cppflags='-DWIN32'
    ccversion='', gccversion='4.9.2', gccosandvers=''
    intsize=4, longsize=4, ptrsize=8, doublesize=8, byteorder=12345678,
doublekind=3
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16,
longdblkind=3
    ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='long
long', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='g++.exe', ldflags ='-s -L"D:\devel\perl\perl\lib\CORE"
-L"D:\devel\perl\c\lib"'
    libpth=D:\devel\perl\c\lib D:\devel\perl\c\x86_64-w64-mingw32\lib
D:\devel\perl\c\lib\gcc\x86_64-w64-mingw32\4.9.2
    libs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool -lcomdlg32
-ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid -lws2_32 -lmpr
-lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32
    perllibs=-lmoldname -lkernel32 -luser32 -lgdi32 -lwinspool
-lcomdlg32 -ladvapi32 -lshell32 -lole32 -loleaut32 -lnetapi32 -luuid
-lws2_32 -lmpr -lwinmm -lversion -lodbc32 -lodbccp32 -lcomctl32
    libc=, so=dll, useshrplib=true, libperl=libperl524.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_win32.xs, dlext=xs.dll, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-mdll -s -L"D:\devel\perl\perl\lib\CORE"
-L"D:\devel\perl\c\lib"'


Characteristics of this binary (from libperl):
  Compile-time options: HAS_TIMES HAVE_INTERP_INTERN MULTIPLICITY
                        PERLIO_LAYERS PERL_COPY_ON_WRITE
                        PERL_DONT_CREATE_GVSV
                        PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
                        PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS
                        PERL_MALLOC_WRAP PERL_PRESERVE_IVUV USE_64_BIT_INT
                        USE_ITHREADS USE_LARGE_FILES USE_LOCALE
                        USE_LOCALE_COLLATE USE_LOCALE_CTYPE
                        USE_LOCALE_NUMERIC USE_LOCALE_TIME USE_PERLIO
                        USE_PERL_ATOF
  Built under MSWin32
  Compiled at May 10 2016 21:42:01
  %ENV:
    PERL5LIB="d:/projects/pcore/lib;"
    PERL_CPANM_HOME="C:\Users\dmytro\AppData\Local\Temp\2\.cpanm"
    PERL_CPANM_OPT="--metacpan"
  @INC:
    d:/projects/pcore/lib
    d:/devel/perl/perl/site/lib/MSWin32-x64-multi-thread
    d:/devel/perl/perl/site/lib
    d:/devel/perl/perl/vendor/lib
    d:/devel/perl/perl/lib
    .

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