 Tess Strickland
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367761987b
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[vm/corelib] Fix ConcurrentModificationError for empty addAll.
Since we only add elements if the iterator is non-empty, we
shouldn't get a ConcurrentModificationError if both the iterator
and receiver are the same empty EfficientLengthIterator.
Fixes https://github.com/dart-lang/sdk/issues/42011
TEST=New regression test added that fails without the sdk change.
Fixed: 42011
Change-Id: Ib5259c8f043cc8277d2fea407d1f64a24430c4d3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173901
Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Tess Strickland <sstrickl@google.com>
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2020-11-25 12:01:44 +00:00 |
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