_SyncIterable::iterator clones unerlying sync* closure to create a new
Iterator using _Closure._clone(). _Closure._clone() was cloning only
1 level of context, relying on a particular context structure.
In bytecode, contexts are allocated in a different way, so sync*
functions could have more then 1 level of contexts. In such case,
parent contexts were not cloned in _Closure._clone() and were shared
between Iterator instances.
This CL adds deep cloning of contexts into _Closure._clone() native method
in order to handle arbitrary number of levels of contexts in a closure.
Fixes language_2/syncstar_yield_test test in bytecode mode.
Change-Id: Ic5ced4c32fc2e21726db76608cd3a7db7e553472
Reviewed-on: https://dart-review.googlesource.com/70600
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Alexander Markov
61b5ba7ecf