Proposed resolution:

This wording is relative to N3376.

1. Change [container.requirements.dataraces]/2 as indicated:

   -2- Notwithstanding ([res.on.data.races]), implementations are required to avoid data races when the contents of the contained object in different elements in the same sequencecontainer, excepting vector<bool>, are modified concurrently.

   -3- [Note: For a vector<int> x with a size greater than one, x[1] = 5 and *x.begin() = 10 can be executed concurrently without a data race, but x[0] = 5 and *x.begin() = 10 executed concurrently may result in a data race. As an exception to the general rule, for a vector<bool> y, y[0] = true may race with y[1] = true. — end note ]

[ 2013-04-20 Bristol ]

[ 2013-03-15 Issues Teleconference ]

Moved to Tentatively Ready.

[container.requirements.dataraces]/2 says "[…] implementations are required to avoid data races when the contents of the contained object in different elements in the same sequence, excepting vector<bool>, are modified concurrently."

This should say "same container" instead of "same sequence", to avoid the interpretation that it only applies to sequence containers.