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* [gcc(refs/vendors/redhat/heads/gcc-8-branch)] PR c++/89917 - ICE with lambda in variadic mem-init.
@ 2020-09-17 16:46 Jakub Jelinek
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From: Jakub Jelinek @ 2020-09-17 16:46 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:5a359c34bd4de7dcd74881fb9ec897c7bd1ea9c9
commit 5a359c34bd4de7dcd74881fb9ec897c7bd1ea9c9
Author: Jason Merrill <jason@redhat.com>
Date: Tue Feb 25 13:37:18 2020 -0500
PR c++/89917 - ICE with lambda in variadic mem-init.
A mem-initializer is not a type, and we don't want to turn autos within it
into packs.
gcc/cp/ChangeLog
2020-02-25 Jason Merrill <jason@redhat.com>
PR c++/89917 - ICE with lambda in variadic mem-init.
* pt.c (make_pack_expansion): Change type_pack_expansion_p to false.
Diff:
---
gcc/cp/ChangeLog | 5 +++++
gcc/cp/pt.c | 2 +-
gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic8.C | 14 ++++++++++++++
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index ffb25f3ab95..a1fee505da6 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-25 Jason Merrill <jason@redhat.com>
+
+ PR c++/89917 - ICE with lambda in variadic mem-init.
+ * pt.c (make_pack_expansion): Change type_pack_expansion_p to false.
+
2020-02-24 Jason Merrill <jason@redhat.com>
PR c++/90951
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index 6dc455ac326..2dc5af44394 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -3944,7 +3944,7 @@ make_pack_expansion (tree arg, tsubst_flags_t complain)
class expansion. */
ppd.visited = new hash_set<tree>;
ppd.parameter_packs = ¶meter_packs;
- ppd.type_pack_expansion_p = true;
+ ppd.type_pack_expansion_p = false;
gcc_assert (TYPE_P (TREE_PURPOSE (arg)));
cp_walk_tree (&TREE_PURPOSE (arg), &find_parameter_packs_r,
&ppd, ppd.visited);
diff --git a/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic8.C b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic8.C
new file mode 100644
index 00000000000..50473f70214
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic8.C
@@ -0,0 +1,14 @@
+// PR c++/89917
+// { dg-do compile { target c++11 } }
+
+struct A
+{
+ A(...);
+};
+
+template<typename... T> struct B : T...
+{
+ B() : T([]{})... {}
+};
+
+B<A> b;
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