为什么我的Perl程序在Mac OS X Lion上冻结？

Question

我已升级到MacOS X Lion。在那之后，我的MacPorts更新到最新版本（2.0.1）和更新的Perl，如下所示：

[Khang-Le-Nguyens-MacBook-Pro:~] khanglenguyen% perl -V 
Summary of my perl5 (revision 5 version 12 subversion 3) configuration: 

    Platform: 
osname=darwin, osvers=11.0.0, archname=darwin-multi-2level 
uname='darwin khang-le-nguyens-macbook-pro.local 11.0.0 darwin kernel version 11.0.0: sat jun 18 12:56:35 pdt 2011; root:xnu-1699.22.73~1release_x86_64 x86_64 ' 
config_args='-D inc_version_list=5.12.2/darwin-multi-2level 5.12.2 5.12.1/darwin-multi-2level 5.12.1 5.12.0/darwin-multi-2level 5.12.0 -des -Dprefix=/opt/local -Dscriptdir=/opt/local/bin -Dcppflags=-I/opt/local/include -Dccflags=-pipe -O2 -arch x86_64 -Dldflags=-L/opt/local/lib -arch x86_64 -Dvendorprefix=/opt/local -Dusemultiplicity=y -D cc=/Developer/usr/bin/llvm-gcc-4.2 -D ld=/Developer/usr/bin/llvm-gcc-4.2 -D man1ext=1pm -D man3ext=3pm -D man1dir=/opt/local/share/man/man1p -D man3dir=/opt/local/share/man/man3p -D siteman1dir=/opt/local/share/man/man1 -D siteman3dir=/opt/local/share/man/man3 -D vendorman1dir=/opt/local/share/man/man1 -D vendorman3dir=/opt/local/share/man/man3 -D pager=/usr/bin/less -sR' 
hint=recommended, useposix=true, d_sigaction=define 
useithreads=undef, usemultiplicity=define 
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef 
use64bitint=define, use64bitall=define, uselongdouble=undef 
usemymalloc=n, bincompat5005=undef 
    Compiler: 
cc='/Developer/usr/bin/llvm-gcc-4.2', ccflags ='-pipe -O2 -arch x86_64 -fno-common -DPERL_DARWIN -I/opt/local/include -no-cpp-precomp -fno-strict-aliasing -fstack-protector -I/opt/local/include', 
optimize='-O3', 
cppflags='-I/opt/local/include -no-cpp-precomp -pipe -O2 -arch x86_64 -fno-common -DPERL_DARWIN -I/opt/local/include -no-cpp-precomp -fno-strict-aliasing -fstack-protector -I/opt/local/include' 
ccversion='', gccversion='4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)', gccosandvers='' 
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678 
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16 
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8 
alignbytes=8, prototype=define 
    Linker and Libraries: 
ld='env MACOSX_DEPLOYMENT_TARGET=10.3 /Developer/usr/bin/llvm-gcc-4.2', ldflags ='-L/opt/local/lib -arch x86_64 -fstack-protector' 
libpth=/opt/local/lib /usr/lib 
libs=-ldbm -ldl -lm -lutil -lc 
perllibs=-ldl -lm -lutil -lc 
libc=, so=dylib, useshrplib=false, libperl=libperl.a 
gnulibc_version='' 
    Dynamic Linking: 
dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' ' 
cccdlflags=' ', lddlflags='-L/opt/local/lib -arch x86_64 -bundle -undefined dynamic_lookup -fstack-protector' 


Characteristics of this binary (from libperl): 
    Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV 
        PERL_IMPLICIT_CONTEXT PERL_MALLOC_WRAP USE_64_BIT_ALL 
        USE_64_BIT_INT USE_LARGE_FILES USE_PERLIO 
        USE_PERL_ATOF 
    Built under darwin 
    Compiled at Aug 10 2011 22:28:59 
    @INC: 
    /opt/local/lib/perl5/site_perl/5.12.3/darwin-multi-2level 
    /opt/local/lib/perl5/site_perl/5.12.3 
    /opt/local/lib/perl5/vendor_perl/5.12.3/darwin-multi-2level 
    /opt/local/lib/perl5/vendor_perl/5.12.3 
    /opt/local/lib/perl5/5.12.3/darwin-multi-2level 
    /opt/local/lib/perl5/5.12.3 
    /opt/local/lib/perl5/site_perl 
    /opt/local/lib/perl5/vendor_perl 

然而，Perl是现在冻结，我无法理解的原因：

[Khang-Le-Nguyens-MacBook-Pro] khanglenguyen% perl matchtopic.pl 

我一直在等待很长一段时间，但没有任何反应。

你有什么想法吗？

Answer 1

按预期工作;这与您使用的Perl版本无关。您正在运行的脚本（如注释中所述）在打印之前等待一行输入。如果你没有输入任何东西，那么在你这样做之前它什么都不会做。