[Bug c++/99861] New: [modules] ICE in hashtab_chk_error

["alexander.lelyakin at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99861

            Bug ID: 99861
           Summary: [modules] ICE in hashtab_chk_error
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alexander.lelyakin at googlemail dot com
  Target Milestone: ---

/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header latch
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header cfenv
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header clocale
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header cmath
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header ciso646
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header unordered_map
/usr/local/bin/g++ -std=c++20 -fmodules-ts -x c++-system-header algorithm
----
hash table checking failed: equal operator returns true for a pair of values
with a different hash value
In file included from /usr/local/include/c++/11.0.1/vector:66,
                 from /usr/local/include/c++/11.0.1/functional:62,
                 from
/usr/local/include/c++/11.0.1/pstl/glue_algorithm_defs.h:13,
                 from /usr/local/include/c++/11.0.1/algorithm:74:
/usr/local/include/c++/11.0.1/bits/stl_uninitialized.h: In static member
function ‘static _ForwardIterator
std::__uninitialized_copy<true>::__uninit_copy(_InputIterator, _InputIterator,
_ForwardIterator)’:
/usr/local/include/c++/11.0.1/bits/stl_uninitialized.h:110:23: internal
compiler error: in hashtab_chk_error, at hash-table.c:137
  110 |         { return std::copy(__first, __last, __result); }
      |                       ^~~~
0x92894b hashtab_chk_error()
        ../../gcc/gcc/hash-table.c:137
0xb35fa5 hash_table<spec_hasher, false, xcallocator>::verify(spec_entry*
const&, unsigned int)
        ../../gcc/gcc/hash-table.h:1033
0xb3652e hash_table<spec_hasher, false,
xcallocator>::find_slot_with_hash(spec_entry* const&, unsigned int,
insert_option)
        ../../gcc/gcc/hash-table.h:968
0xaf315b match_mergeable_specialization(bool, spec_entry*)
        ../../gcc/gcc/cp/pt.c:29942
0xa6cf43 trees_in::key_mergeable(int, merge_kind, tree_node*, tree_node*,
tree_node*, tree_node*, bool)
        ../../gcc/gcc/cp/module.cc:10667
0xa70564 trees_in::decl_value()
        ../../gcc/gcc/cp/module.cc:7899
0xa693c7 trees_in::tree_node(bool)
        ../../gcc/gcc/cp/module.cc:9150
0xa6f9eb module_state::read_cluster(unsigned int)
        ../../gcc/gcc/cp/module.cc:14797
0xa6feed module_state::load_section(unsigned int, binding_slot*)
        ../../gcc/gcc/cp/module.cc:18068
0xa6ffaf module_state::lazy_load(unsigned int, binding_slot*)
        ../../gcc/gcc/cp/module.cc:18726
0xa6a230 trees_in::tree_node(bool)
        ../../gcc/gcc/cp/module.cc:9661
0xa6b046 trees_in::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6662
0xa68a97 trees_in::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7057
0xa68a97 trees_in::tree_value()
        ../../gcc/gcc/cp/module.cc:8927
0xa68ecf trees_in::tree_node(bool)
        ../../gcc/gcc/cp/module.cc:9145
0xa6acd1 trees_in::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6413
0xa68a97 trees_in::tree_node_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:7057
0xa68a97 trees_in::tree_value()
        ../../gcc/gcc/cp/module.cc:8927
0xa68ecf trees_in::tree_node(bool)
        ../../gcc/gcc/cp/module.cc:9145
0xa6acd1 trees_in::core_vals(tree_node*)
        ../../gcc/gcc/cp/module.cc:6413
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Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
----
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