[Moved to DR at the November, 2016 meeting.]

Proposed resolution (November, 2015):

Change 6.9.2 [intro.multithread] paragraph 23 as follows:

Two actions are potentially concurrent if

• they are performed by different threads, or

• they are unsequenced, and at least one is performed by a signal handler, and they are not both performed by the same signal handler invocation.

Notes from the October, 2015 meeting:

SG1 agrees that the existing wording should be amended to say something like “and they are not both performed by the same signal handler invocation.”

According to 6.9.2 [intro.multithread] paragraph 23,

Two actions are potentially concurrent if

• they are performed by different threads, or

• they are unsequenced, and at least one is performed by a signal handler.

This definition should exclude the case when both actions are performed by a signal handler.