[PATCH v3 5/6] c++/modules: Add testcase for fixed ICE [PR116568]

[Nathaniel Shead]

This ICE was fixed by ensuring that the lambdas had
LAMBDA_EXPR_EXTRA_SCOPE properly set.

        PR c++/116568

gcc/testsuite/ChangeLog:

        * g++.dg/modules/lambda-8.h: New test.
        * g++.dg/modules/lambda-8_a.H: New test.
        * g++.dg/modules/lambda-8_b.C: New test.

Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>
---
 gcc/testsuite/g++.dg/modules/lambda-8.h   | 7 +++++++
 gcc/testsuite/g++.dg/modules/lambda-8_a.H | 5 +++++
 gcc/testsuite/g++.dg/modules/lambda-8_b.C | 5 +++++
 3 files changed, 17 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/modules/lambda-8.h
 create mode 100644 gcc/testsuite/g++.dg/modules/lambda-8_a.H
 create mode 100644 gcc/testsuite/g++.dg/modules/lambda-8_b.C

diff --git a/gcc/testsuite/g++.dg/modules/lambda-8.h 
b/gcc/testsuite/g++.dg/modules/lambda-8.h
new file mode 100644
index 00000000000..0c66f053b20
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/lambda-8.h
@@ -0,0 +1,7 @@
+template <typename> struct S {
+  template <typename> static constexpr auto x = []{};
+  template <typename> using t = decltype([]{});
+};
+
+inline auto x = S<int>::x<int>;
+using t = S<int>::t<int>;
diff --git a/gcc/testsuite/g++.dg/modules/lambda-8_a.H 
b/gcc/testsuite/g++.dg/modules/lambda-8_a.H
new file mode 100644
index 00000000000..d20958ee140
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/lambda-8_a.H
@@ -0,0 +1,5 @@
+// PR c++/116568
+// { dg-additional-options "-fmodules-ts -std=c++20" }
+// { dg-module-cmi {} }
+
+#include "lambda-8.h"
diff --git a/gcc/testsuite/g++.dg/modules/lambda-8_b.C 
b/gcc/testsuite/g++.dg/modules/lambda-8_b.C
new file mode 100644
index 00000000000..05ea4afd8c1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/lambda-8_b.C
@@ -0,0 +1,5 @@
+// PR c++/116568
+// { dg-additional-options "-fmodules-ts -std=c++20" }
+
+#include "lambda-8.h"
+import "lambda-8_a.H";
-- 
2.47.0