This test fails only intermittently.
The failure is caused by a problem in Boost code. The Boost developer is aware of the problem and plans to fix it.
The failure is caused by a compiler bug.
The failure is caused by a compiler bug, which has been reported to the compiler supplier (or is already known to them).
The failure is caused by a standard library bug.
The failure is caused by a standard library bug, which has been reported to the standard library supplier (or is already known to them).
The failure is probably caused by the test code, harness, or configuration. Thus it may not affect users of the library.
The failure is serious and likely to prevent all use of this Boost library with this compiler.
The failure is serious and likely to prevent all use of this Boost library with this compiler. The failure is caused by a compiler bug, which has been reported to the compiler supplier (or is already known to them).
The failure is caused by a platform API bug.
The failure is caused by a platform API bug, which has been reported to the platform API supplier (or is already known to them).
The failure is not serious and will not affect most users. The library degrades gracefully.
This compiler's bugs are not supported by the library.