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PR c++/82331 - ICE with variadic partial specialization of auto

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* pt.c (unify) [TEMPLATE_PARM_INDEX]: Set processing_template_decl
	around call to tsubst.

From-SVN: r256807
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Jason Merrill 2018-01-17 13:07:53 -05:00 committed by Jason Merrill
parent d1f067b812
commit 99547487e1
3 changed files with 24 additions and 0 deletions
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4
gcc/cp/ChangeLog
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@ -1,5 +1,9 @@
2018-01-17 Jason Merrill <jason@redhat.com>
PR c++/82331 - ICE with variadic partial specialization of auto
* pt.c (unify) [TEMPLATE_PARM_INDEX]: Set processing_template_decl
around call to tsubst.
PR c++/82760 - memory corruption with aligned new.
* call.c (build_operator_new_call): Update *args if we add the
align_arg.

2
gcc/cp/pt.c
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@ -20686,7 +20686,9 @@ unify (tree tparms, tree targs, tree parm, tree arg, int strict,
template-parameter exactly, except that a template-argument
deduced from an array bound may be of any integral type.
The non-type parameter might use already deduced type parameters. */
++processing_template_decl;
tparm = tsubst (TREE_TYPE (parm), targs, 0, NULL_TREE);
--processing_template_decl;
if (tree a = type_uses_auto (tparm))
{
tparm = do_auto_deduction (tparm, arg, a, complain, adc_unify);

18
gcc/testsuite/g++.dg/cpp1z/nontype-auto13.C Normal file
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@ -0,0 +1,18 @@
// PR c++/82331
// { dg-options -std=c++17 }
template <auto>
class X;
template <typename R, typename... A, R (*F) (A...)>
class X<F> {
public:
static R call (A... args)
{
return (*F)(args...);
}
};
int func (int a, int b) { return a + b; }
int test () { return X<&func>::call(1, 2); }