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r32590 | naruse | 2011-07-21 00:20:14 +0900 (Thu, 21 Jul 2011) | 7 lines

Add test for r32586.

FreeBSD (at least 7.2 to 7.2) calls nsdispatch(3) when it calls
getaddrinfo(3). And nsdispatch(3) doesn't call dlerror(3) even if
it calls _nss_cache_cycle_prevention_function with dlsym(3).
So our DL::Handle#sym must call dlerror(3) before call dlsym.
In general uses of dlerror(3) should call it before use it.
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32624 b2dd03c8-39d4-4d8f-98ff-823fe69b080e