perlbrew 失败并显示“无法找到 Devel/PatchPerl.pm”

perlbrew失败了Can't locate Devel/PatchPerl.pm.

更准确地说，失败的是运行patchperl这是由产生的perlbrew.

There is事实上Devel/PatchPerl.pm通过环境变量中的路径访问PERL5LIB, but perlbrew无条件地deletes这个变量在运行之前perlpatch:

delete $ENV{$_} for qw(PERL5LIB PERL5OPT);

我在其中找不到任何内容perlbrew证明此操作合理性的文件。

有人可以解释为什么吗perlbrew做这个？

EDIT:

下面是一个bash重现问题的脚本。我像这样运行它（使用一些合适的<PATH_TO_SCRIPT>):

% env -i HOME=$HOME SHELL=/bin/bash /bin/bash --noprofile --norc
bash-3.2$ /bin/bash --norc --noprofile <PATH_TO_SCRIPT>

该脚本在我的机器上运行时间约为 4 分钟。最后几行输出，包括显示错误的行如下：

(cd /tmp/perlbrew_root/build/perl-5.16.3 && rm -f config.sh Policy.sh && patchperl && sh Configure -de '-Dprefix=/tmp/perlbrew_root/perls/perl-5.16.3' '-A'eval:scriptdir=/tmp/perlbrew_root/perls/perl-5.16.3/bin'' && make  && make test_harness && make install) 2>&1 | tee /tmp/perlbrew_root/build.perl-5.16.3.log
Can't locate Devel/PatchPerl.pm in @INC (@INC contains: /Library/Perl/5.12/darwin-thread-multi-2level /Library/Perl/5.12 /Network/Library/Perl/5.12/darwin-thread-multi-2level /Network/Library/Perl/5.12 /Library/Perl/Updates/5.12.3 /System/Library/Perl/5.12/darwin-thread-multi-2level /System/Library/Perl/5.12 /System/Library/Perl/Extras/5.12/darwin-thread-multi-2level /System/Library/Perl/Extras/5.12 .) at /tmp/testperl/bin/patchperl line 12.
BEGIN failed--compilation aborted at /tmp/testperl/bin/patchperl line 12.
perl-5.16.3 is successfully installed.

上面输出的最后一行 (perl-5.16.3 is successfully installed.）是废话：真正的构建和安装perl-5.16.3所花费的时间大约比该脚本的运行时间长一个数量级，如前所述，在我的机器上大约需要 4 分钟。

请注意@INC在错误中。我不明白怎么办patchperl可能会发现Devel/PatchPerl.pm，这是在/tmp/testperl/lib/perl5， 鉴于@INC.

PERLDIR=/tmp/testperl
/bin/rm -rf "$PERLDIR"

/bin/rm -rf /tmp/build
/bin/mkdir -p /tmp/build
cd /tmp/build

/usr/bin/curl -s http://www.cpan.org/authors/id/A/AP/APEIRON/local-lib-1.008009.tar.gz | tar xzf -

pushd local-lib-1.008009
  /usr/bin/perl Makefile.PL "--bootstrap=$PERLDIR"
  /usr/bin/make install
popd

eval "$( /usr/bin/perl -I$PERLDIR/lib/perl5 -Mlocal::lib=$PERLDIR )"

/usr/bin/cpan App::cpanminus

export PERLBREW_ROOT=/tmp/perlbrew_root
export PERLBREW_HOME=/tmp/perlbrew_home
/bin/rm -rf "$PERLBREW_ROOT" "$PERLBREW_HOME"

$PERLDIR/bin/cpanm App::perlbrew
$PERLDIR/bin/perlbrew init
source "$PERLBREW_ROOT/etc/bashrc"

$PERLDIR/bin/perlbrew install -v perl-5.16.3

升级 perlbrew (perlbrew self-upgrade或 shell bootstrap 咒语http://perlbrew.pl/ http://perlbrew.pl/).

最新版本将 patchperl 安装到$PERLBREW_ROOT/bin通过perlbrew install-patchperl.