Don't insert an entry to loading_tbl if another thread succeed to load.
If rb_thread_shield_wait() returns Qfalse, the file has been successfully
loaded by another thread, so there is no need to insert a new entry into
loading_tbl. [ruby-core:78464] [Bug #12999]
Added by shugo (Shugo Maeda) over 7 years ago
Don't insert an entry to loading_tbl if another thread succeed to load.
If rb_thread_shield_wait() returns Qfalse, the file has been successfully
loaded by another thread, so there is no need to insert a new entry into
loading_tbl. [ruby-core:78464] [Bug #12999]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e