http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51617
--- Comment #1 from Dave Abrahams <dave at boostpro dot com> 2011-12-19 05:11:20 UTC --- I should add this (non-normative, but still) note from [futures.async]: [ Note: If this policy is specified together with other policies, such as when using a policy value of launch::async | launch::deferred, implementations should defer invocation or the selection of the policy when no more concurrency can be effectively exploited. — end note ]
