[ruby-core:52129] [ruby-trunk - Bug #7828][Open] invalid glibcver in test_m17n_comb.rb:test_str_crypt fails 2.17 system

Issue #7828 has been reported by jonforums (Jon Forums).

----------------------------------------
Bug #7828: invalid glibcver in test_m17n_comb.rb:test_str_crypt fails 2.17 system
https://bugs.ruby-lang.org/issues/7828

Author: jonforums (Jon Forums)
Status: Open
Priority: Normal
Assignee: 
Category: test
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2013-02-12 trunk 39207) [i686-linux]


On my Arch 3.7.6 32bit system with a 2.17 libc, the following line in `test_m17n_comb.rb:test_str_crypt` causes the test to fail

  glibcver = `#{RbConfig::CONFIG["libdir"]}/libc.so.6`[/\AGNU C Library.*version ([0-9.]+)/, 1].split('.').map(&:to_i)

because libc.so.6 doesn't exist in `RbConfig::CONFIG["libdir"]`. As such, invalid salt values aren't skipped and `String#crypt` fails due to an invalid "__" (underscore underscore) salt value.

Details of the failure are shown below (ignore the line numbers as I instrumented the test), but the following are the libc locations for my systems of interest:

  Ubuntu Server 12.10 32bit:
    /lib/i386-linux-gnu/libc.so.6 (v2.15)

  Arch 3.7.6 32bit:
    /usr/lib/libc.so.6 (v2.17)

  Ubuntu Server 12.10 64bit:
    /lib/x86_64-linux-gnu/libc.so.6 (v2.15)



Failure details
===============

[jon@archee build]$ uname -a
Linux archee 3.7.6-1-ARCH \#1 SMP PREEMPT Mon Feb 4 10:21:12 CET 2013 i686 GNU/Linux

[jon@archee build]$ /usr/lib/libc.so.6 | head -1
GNU C Library (GNU libc) stable release version 2.17, by Roland McGrath et al.

[jon@archee build]$ ruby -rrbconfig -v -e 'puts RbConfig::CONFIG["libdir"]'
ruby 2.0.0dev (2013-02-12 trunk 39207) [i686-linux]
/usr/local/lib

[jon@archee build]$ make test-all TESTS="ruby/test_m17n_comb.rb"
        CC = gcc
        LD = ld
        LDSHARED = gcc -shared
        CFLAGS = -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Werror=pointer-arith -Werror=write-strings -Werror=declaration-after-statement -Werror=implicit-function-declaration -ansi -std=iso9899:199409  -fPIC
        XCFLAGS = -include ruby/config.h -include ruby/missing.h -D_FORTIFY_SOURCE=2 -fstack-protector -fno-strict-overflow -fvisibility=hidden -DRUBY_EXPORT
        CPPFLAGS =   -I. -I.ext/include/i686-linux -I../include -I..
        DLDFLAGS = -Wl,-soname,libruby.so.2.0 -fstack-protector
        SOLIBS = -lpthread -lrt -ldl -lcrypt -lm
./miniruby -I../lib -I. -I.ext/common  ../tool/runruby.rb --extout=.ext  -- --disable-gems "../test/runner.rb" --ruby="./miniruby -I../lib -I. -I.ext/common  ../tool/runruby.rb --extout=.ext  -- --disable-gems"  ruby/test_m17n_comb.rb
Run options: "--ruby=./miniruby -I../lib -I. -I.ext/common  ../tool/runruby.rb --extout=.ext  -- --disable-gems"

# Running tests:

[27/77] TestM17NComb#test_str_crypt
RbConfig::CONFIG['libdir'] = /usr/local/lib
glibcver = , strict_crypt =
salt_orig = 臓臓, salt_orig.length = 1
salt = 臓臓, salt.length = 2
 = 0.01 s
  1) Error:
test_str_crypt(TestM17NComb):
Errno::EINVAL: Invalid argument - crypt
    /home/jon/rubydev/ruby-svn/test/ruby/test_m17n_comb.rb:744:in `crypt'
    /home/jon/rubydev/ruby-svn/test/ruby/test_m17n_comb.rb:744:in `block in test_str_crypt'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:83:in `block in each'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:75:in `block in each_index'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:46:in `block in make_large_block'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:26:in `block (2 levels) in make_basic_block'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:21:in `times'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:21:in `block in make_basic_block'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:20:in `times'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:20:in `make_basic_block'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:45:in `make_large_block'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:71:in `each_index'
    /home/jon/rubydev/ruby-svn/test/ruby/allpairs.rb:82:in `each'
    /home/jon/rubydev/ruby-svn/test/ruby/test_m17n_comb.rb:60:in `combination'
    /home/jon/rubydev/ruby-svn/test/ruby/test_m17n_comb.rb:730:in `test_str_crypt'

Finished tests in 7.171895s, 10.7364 tests/s, 29005.8640 assertions/s.
77 tests, 208027 assertions, 0 failures, 1 errors, 0 skips

ruby -v: ruby 2.0.0dev (2013-02-12 trunk 39207) [i686-linux]


[jon@archee build]$ ripl
>> ''.crypt('__')
Errno::EINVAL: Invalid argument - crypt
    (ripl):2:in `crypt'
    (ripl):2:in `<main>'


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