6e885ad328
This ICE was caused by a stray TREE_VISITED marker. The lookup
machinery was leaving it there due to the way I'd arranged for it to
be cleared. That was presuming the name_lookup::value field didn't
change, and that wasn't always true in the using-decl processing. I
took the opportunity to break out a helper, and then call it
immediately after lookups, rather than wait until destructor time.
Added some asserts the module machinery to catch further cases of
this.
PR c++/99238
gcc/cp/
* module.cc (depset:#️⃣:add_binding_entity): Assert not
visited.
(depset::add::add_specializations): Likewise.
* name-lookup.c (name_lookup::dedup): New.
(name_lookup::~name_lookup): Assert not deduping.
(name_lookup::restore_state): Likewise.
(name_lookup::add_overload): Replace outlined code with dedup
call.
(name_lookup::add_value): Likewise.
(name_lookup::search_namespace_only): Likewise.
(name_lookup::adl_namespace_fns): Likewise.
(name_lookup::adl_class_fns): Likewise.
(name_lookup::search_adl): Likewise. Add clearing dedup call.
(name_lookup::search_qualified): Likewise.
(name_lookup::search_unqualified): Likewise.
gcc/testsuite/
* g++.dg/modules/pr99238.h: New.
* g++.dg/modules/pr99238_a.H: New.
* g++.dg/modules/pr99238_b.H: New.
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