From @rurban

This is a bug report for perl from rurban@​x-ray.at,
generated with the help of perlbug 1.39 running under perl 5.11.5.

Meta ticket to cover all 5.10 regressions for the new
cygwin-1.7, unsupported with 5.10.

Some are just bad tests, some require support for
the new cygwin features.

5.11.5 - cygwin-1.7 - threaded​:
Failed 52 tests out of 1681, 96.91% okay.
../cpan/Compress-Raw-Bzip2/t/01bzip2.t ../cpan/Compress-Raw-Zlib/t/02zlib.t
../cpan/Compress-Raw-Zlib/t/07bufsize.t ../cpan/DB_File/t/db-btree.t
../cpan/DB_File/t/db-hash.t ../cpan/DB_File/t/db-recno.t
../cpan/Encode/t/enc_data.t ../cpan/Encode/t/enc_eucjp.t
../cpan/Encode/t/enc_module.t ../cpan/Encode/t/enc_utf8.t
../cpan/Encode/t/encoding.t ../cpan/Encode/t/jperl.t
../cpan/Encode/t/mime-name.t ../cpan/Encode/t/perlio.t
../cpan/ExtUtils-MakeMaker/t/MM_Cygwin.t
../cpan/ExtUtils-ParseXS/t/more.t ../cpan/Memoize/t/tie.t
../cpan/Memoize/t/tie_gdbm.t ../cpan/Win32/t/Unicode.t
../cpan/Win32API-File/t/file.t ../cpan/podlators/t/man-utf8.t
../cpan/podlators/t/man.t ../cpan/podlators/t/text-utf8.t
../dist/Safe/t/safesort.t ../ext/Devel-DProf/t/DProf.t
../ext/GDBM_File/t/gdbm.t ../ext/NDBM_File/t/ndbm.t
../ext/ODBM_File/t/odbm.t ../ext/PerlIO-encoding/t/encoding.t
../ext/PerlIO-encoding/t/fallback.t ../ext/SDBM_File/t/sdbm.t
../ext/XS-APItest/t/hash.t ../lib/AnyDBM_File.t
../lib/DBM_Filter/t/01error.t ../lib/DBM_Filter/t/02core.t
../lib/DBM_Filter/t/compress.t ../lib/DBM_Filter/t/encode.t
../lib/DBM_Filter/t/int32.t ../lib/DBM_Filter/t/null.t
../lib/DBM_Filter/t/utf8.t io/fs.t io/layers.t lib/cygwin.t
op/filetest.t op/taint.t uni/chomp.t uni/chr.t uni/greek.t
uni/latin2.t uni/tr_eucjp.t uni/tr_sjis.t uni/tr_utf8.t

  cppflags='-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -march=pentium4
-mfpmath=sse -mieee-fp -mmmx -msse -msse2 -fno-strict-aliasing -pipe
-fstack-protector -I/usr/local/include'
  ccversion='', gccversion='4.3.4 20090804 (release) 1', gccosandvers=''
  intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
  d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
  ivtype='long long', ivsize=8, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=8
  alignbytes=8, prototype=define
  Linker and Libraries​:
  ld='g++', ldflags =' -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -fstack-protector -L/usr/local/lib'
  libpth=/usr/local/lib /usr/lib /lib
  libs=-lgdbm -ldb -ldl -lcrypt -lgdbm_compat
  perllibs=-ldl -lcrypt
  libc=/usr/lib/libc.a, so=dll, useshrplib=true,
libperl=cygperl5_11_5@​f1fc40f4.dll
  gnulibc_version=''
  Dynamic Linking​:
  dlsrc=dl_dlopen.xs, dlext=dll, d_dlsymun=undef, ccdlflags=' '
  cccdlflags=' ', lddlflags=' --shared -Wl,--enable-auto-import
-Wl,--export-all-symbols -Wl,--stack,8388608
-Wl,--enable-auto-image-base -L/usr/local/lib -fstack-protector'

Locally applied patches​:

@​INC for perl 5.11.5​:
  lib
  lib/auto
  /usr/lib/perl5/site_perl/5.11.5/i686-cygwin
  /usr/lib/perl5/site_perl/5.11.5
  /usr/lib/perl5/vendor_perl/5.11.5/i686-cygwin
  /usr/lib/perl5/vendor_perl/5.11.5
  /usr/lib/perl5/5.11.5/i686-cygwin
  /usr/lib/perl5/5.11.5
  /usr/lib/perl5/site_perl
  /usr/lib/perl5/vendor_perl
  /usr/lib/perl5/site_perl/5.11
  /usr/lib/perl5/site_perl/5.10
  /usr/lib/perl5/vendor_perl/5.10
  /usr/lib/perl5/site_perl/5.8
  .

Environment for perl 5.11.5​:
  HOME=/home/rurban
  LANG=C.ISO-8859-1
  LANGUAGE (unset)
  LD_LIBRARY_PATH (unset)
  LOGDIR (unset)

PATH=~/bin​:/usr/bin​:/usr/sbin​:/usr/local/sbin​:/usr/local/bin​:/usr/bin​:/bin​:/usr/X11R6/bin​:/cygdrive/c/WINDOWS/system32​:/cygdrive/c/WINDOWS​:/usr/bin​:/cyg1/bin​:/cyg1/usr/local/bin​:/cygdrive/c/WINDOWS/System32/Wbem​:/cygdrive/c/Programme/ATI
Technologies/ATI.ACE/Core-Static​:/cygdrive/c/Programme/Gemeinsame
Dateien/Ulead
Systems/MPEG​:/cygdrive/u​:/cygdrive/c/Programme/QuickTime/QTSystem/​:/usr/lib/lapack
  PERL_BADLANG (unset)
  SHELL (unset)
--
Reini Urban
http​://phpwiki.org/ http​://murbreak.at/

@rurban - Status changed from 'new' to 'open'

Given these reports are for perl 5.11 and we're on 5.31 at this point, I'm closing this case as dated. If new information is made available for cygwin on 5.30+, we should totally look into it. Thanks!