| Subject: | Non-obvious errors on fork() out of memory |
Underlying problem (found by strace):
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f7216df19d0) = -1 ENOMEM (Cannot allocate memory)
Resultant terminal output:
$ cpan
cpan shell -- CPAN exploration and modules installation (v1.960001)
Enter 'h' for help.
cpan[1]> look Future
Going to read '/home/leo/.cpan/Metadata'
Database was generated on Wed, 22 Jan 2014 02:53:02 GMT
Running look for module 'Future'
Trying to open a subshell in the build directory...
Fetching with LWP:
http://cpan.weepeetelecom.nl/authors/id/P/PE/PEVANS/Future-0.23.tar.gz
Fetching with LWP:
http://cpan.weepeetelecom.nl/authors/id/P/PE/PEVANS/CHECKSUMS
Checksum for /home/leo/.cpan/sources/authors/id/P/PE/PEVANS/Future-0.23.tar.gz ok
Scanning cache /home/leo/.cpan/build for sizes
Use of uninitialized value $newdir in substitution (s///) at /usr/lib/perl/5.14/Cwd.pm line 330.
Use of uninitialized value $newdir in chdir at /usr/lib/perl/5.14/Cwd.pm line 338.
Use of chdir('') or chdir(undef) as chdir() is deprecated at /usr/lib/perl/5.14/Cwd.pm line 338.
Use of uninitialized value $newdir in pattern match (m//) at /usr/lib/perl/5.14/Cwd.pm line 353.
Use of uninitialized value $newdir in split at /usr/lib/perl/5.14/Cwd.pm line 359.
DONE
Uncompressed /home/leo/.cpan/sources/authors/id/P/PE/PEVANS/Future-0.23.tar.gz successfully
Using Tar:/bin/tar xf "Future-0.23.tar":
Couldn't untar Future-0.23.tar
Package seems to come without Makefile.PL.
(The test -f "/home/leo/.cpan/build/PEVANS-WQhHb3/Makefile.PL" returned false.)
Writing one on our own (setting NAME to Future)
Working directory is /home/leo/.cpan/build/PEVANS-WQhHb3
Subprocess shell exit code 72057594037927935
Catching error: "safe_chdir called without todir argument at /usr/share/perl/5.14/CPAN/InfoObj.pm line 53\cJ\cICPAN::InfoObj::safe_chdir('CPAN::Distribution=HASH(0xc84dd90)', undef) called at /usr/share/perl/5.14/CPAN/Distribution.pm line 1276\cJ\cICPAN::Distribution::look('CPAN::Distribution=HASH(0xc84dd90)') called at /usr/share/perl/5.14/CPAN/Module.pm line 479\cJ\cIeval {...} called at /usr/share/perl/5.14/CPAN/Module.pm line 478\cJ\cICPAN::Module::rematein('CPAN::Module=HASH(0xaac9b40)', 'look') called at /usr/share/perl/5.14/CPAN/Module.pm line 497\cJ\cICPAN::Module::look('CPAN::Module=HASH(0xaac9b40)') called at /usr/share/perl/5.14/CPAN/Shell.pm line 1796\cJ\cICPAN::Shell::rematein('CPAN::Shell', 'look', 'Future') called at /usr/share/perl/5.14/CPAN/Shell.pm line 1976\cJ\cICPAN::Shell::__ANON__('CPAN::Shell', 'Future') called at /usr/share/perl/5.14/CPAN.pm line 375\cJ\cIeval {...} called at /usr/share/perl/5.14/CPAN.pm line 372\cJ\cICPAN::shell() called at /usr/share/perl/5.14/App/Cpan.pm line 295\cJ\cIApp::Cpan::_process_options('App::Cpan') called at /usr/share/perl/5.14/App/Cpan.pm line 364\cJ\cIApp::Cpan::run('App::Cpan') called at /usr/bin/cpan line 11\cJ" at /usr/share/perl/5.14/CPAN.pm line 391
CPAN::shell() called at /usr/share/perl/5.14/App/Cpan.pm line 295
App::Cpan::_process_options('App::Cpan') called at /usr/share/perl/5.14/App/Cpan.pm line 364
App::Cpan::run('App::Cpan') called at /usr/bin/cpan line 11
cpan[2]>
Highly non-obvious that was the failure.
$ perlmodversion CPAN
1.960001
--
Paul Evans