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author | Marek Polacek <polacek@redhat.com> | 2024-06-14 17:50:29 -0400 |
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committer | Marek Polacek <polacek@redhat.com> | 2024-06-25 15:11:30 -0400 |
commit | ed6ffc4e62f716d1b31d599d22594dd969da137f (patch) | |
tree | b8e6ddccdb124966efc08d5846d79e05ca0dbcc0 /gcc/testsuite/g++.dg | |
parent | 71f484d02b2b3e8616cd7af27a0d4c72e4c7e977 (diff) | |
download | gcc-ed6ffc4e62f716d1b31d599d22594dd969da137f.zip gcc-ed6ffc4e62f716d1b31d599d22594dd969da137f.tar.gz gcc-ed6ffc4e62f716d1b31d599d22594dd969da137f.tar.bz2 |
c++: ICE with generic lambda and pack expansion [PR115425]
In r13-272 we hardened the *_PACK_EXPANSION and *_ARGUMENT_PACK macros.
That trips up here because make_pack_expansion returns error_mark_node
and we access that with PACK_EXPANSION_LOCAL_P.
PR c++/115425
gcc/cp/ChangeLog:
* pt.cc (tsubst_pack_expansion): Return error_mark_node if
make_pack_expansion doesn't work out.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/lambda-generic12.C: New test.
Diffstat (limited to 'gcc/testsuite/g++.dg')
-rw-r--r-- | gcc/testsuite/g++.dg/cpp2a/lambda-generic12.C | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp2a/lambda-generic12.C b/gcc/testsuite/g++.dg/cpp2a/lambda-generic12.C new file mode 100644 index 0000000..219529c --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp2a/lambda-generic12.C @@ -0,0 +1,25 @@ +// PR c++/115425 +// { dg-do compile { target c++20 } } + +using size_t = decltype(sizeof(0)); + +template <int... I> +struct X {}; + +template<int... Is> +void foo(X<Is...>); + +template<auto> +struct S; + +template<class T> +auto test() { + constexpr static auto x = foo<X<__integer_pack (0)...>>(); // { dg-error "no matching function" } + return []<size_t... Is>(X<Is...>) { + (typename S<x[Is]>::type{}, ...); + }(X<__integer_pack (0)...>{}); +} + +int main() { + test<int>(); +} |