[gcc r11-7953] c++: variadic lambda noexcept-specifier [PR99583]

[gcc r11-7953] c++: variadic lambda noexcept-specifier [PR99583]

[Jason Merrill]

https://gcc.gnu.org/g:0cf4813202f19768e31666f6aa82bde4dce4065a

commit r11-7953-g0cf4813202f19768e31666f6aa82bde4dce4065a
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Apr 1 15:17:40 2021 -0400

    c++: variadic lambda noexcept-specifier [PR99583]
    
    The tree-walk looking for parameter packs didn't find this one because we
    weren't stepping into TYPE_RAISES_EXCEPTIONS.
    
    gcc/cp/ChangeLog:
    
            PR c++/99583
            PR c++/99584
            * tree.c (cp_walk_subtrees) [FUNCTION_TYPE]: Walk into
            TYPE_RAISES_EXCEPTIONS.
    
    gcc/testsuite/ChangeLog:
    
            PR c++/99583
            * g++.dg/cpp0x/lambda/lambda-variadic12.C: New test.

Diff:
---
 gcc/cp/tree.c                                         | 5 +++++
 gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic12.C | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index dca947bf52a..13cc61c3123 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -5415,6 +5415,11 @@ cp_walk_subtrees (tree *tp, int *walk_subtrees_p, walk_tree_fn func,
 	}
       break;
 
+    case FUNCTION_TYPE:
+    case METHOD_TYPE:
+      WALK_SUBTREE (TYPE_RAISES_EXCEPTIONS (*tp));
+      break;
+
     default:
       return NULL_TREE;
     }
diff --git a/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic12.C b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic12.C
new file mode 100644
index 00000000000..674615748e6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic12.C
@@ -0,0 +1,9 @@
+// PR c++/99583
+// { dg-do compile { target c++11 } }
+
+void f(...);
+
+template <bool... B>
+void g() {
+ f([]() noexcept(B) {} ...);
+}