On 3/23/25 1:55 AM, Simon Martin wrote:
Hi,

On Sat Sep 14, 2024 at 10:00 AM CEST, Jason Merrill wrote:
On 9/13/24 1:31 PM, Simon Martin wrote:
We currently ICE upon the following testcase when using -ftime-report

=== cut here ===
template < int> using __conditional_t = int;
template < typename _Iter >
concept random_access_iterator = requires { new _Iter; };
template < typename _Iterator >
struct reverse_iterator {
    using iterator_concept =
      __conditional_t< random_access_iterator< _Iterator>>;
};
void RemoveBottom() {
    int iter;
    for (reverse_iterator< int > iter;;)
        ;
}
=== cut here ===

The problem is that qualified_namespace_lookup does a plain start() of
the TV_NAME_LOOKUP timer (that asserts that the timer is not already
started). However this timer has already been cond_start()'d in the call
stack - by pushdecl - so the assert fails.

This patch simply ensures that we always conditionally start this timer
(which is done in all other places that use it).

OK, thanks.
Richard B suggested in the ticket to try to backport since that bug can
get in the way of some investigations.

I have checked and the patch applies cleanly on GCC 13 and 14, and tests
are successful for both on x86_64-pc-linux-gnu.

OK for backporting there?

OK.

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