Thanks for the patch and sorry that there was no response.
I've added the C++ maintainers to cc:
nick <xerofo...@gmail.com> writes:
> I'm pinging this patch as it's old now and should be applied to fix the bug.
>
> Nick
>
> On 2019-04-08 7:20 p.m., Nicholas Krause wrote:
>> This fixes the caller in tsubst_requires_expr to
>> tsubst_constraint_variables to wrap their respective
>> trees in PARM_CONSTR_PARMS. This is to get the correct
>> parmeter constraints from the tree before calling
>> tsubst_constraint_variables like other callers
>> in constraint.cc and to fix the bug id, 88395 on
>> the gcc bugzilla. OK for merge?
>>
>> Signed-off-by: Nicholas Krause <xerofo...@gmail.com>
>> ---
>> gcc/cp/constraint.cc | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
>> index 9884eb0db50..a78d0a9a49b 100644
>> --- a/gcc/cp/constraint.cc
>> +++ b/gcc/cp/constraint.cc
>> @@ -1882,7 +1882,7 @@ tsubst_requires_expr (tree t, tree args,
>> tree parms = TREE_OPERAND (t, 0);
>> if (parms)
>> {
>> - parms = tsubst_constraint_variables (parms, args, complain, in_decl);
>> + parms = tsubst_constraint_variables (PARM_CONSTR_PARMS (parms), args,
>> complain, in_decl);
>> if (parms == error_mark_node)
>> return error_mark_node;
>> }
>>
