[PATCH libstdc++] Fix for std::uncaught_exception (PR 62258)

[Jonathan Wakely]

On 02/02/15 03:37 +0100, Michael Hanselmann wrote:
>Calls to `std::uncaught_exception` after calling
>`std::rethrow_exception' always return `true' when
>`std::uncaught_exception' should return `false' unless an exception is
>in flight. `std::rethrow_exception' does not update
>`__cxa_eh_globals::uncaughtExceptions' while the following call to
>`__cxa_begin_catch' decrements it. This fixes PR 62258.
>
>The original two-line patch was created by Dmitry Prokoptsev. Michael

>Hanselmann implemented a testcase.

Committed to trunk - thanks for the patch and test.

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