[MS ABI] Don't crash while mangling recursive lambdas
We might get into bad situations where we try to embed the signature of
an inner lambda into an outer lambda which cannot work: the inner lambda
wants to embed the name of the outer lambda!
Instead, omit the return type for lambdas.
This fixes PR26105.
N.B. While we are here, make lambdas nested within functions use an
artificial scope so that they can get demangled.
llvm-svn: 258003
diff --git a/clang/test/CodeGenCXX/pr20719.cpp b/clang/test/CodeGenCXX/pr20719.cpp
index 208d111..1c3b21b 100644
--- a/clang/test/CodeGenCXX/pr20719.cpp
+++ b/clang/test/CodeGenCXX/pr20719.cpp
@@ -2,8 +2,8 @@
// Make sure that we emit H's constructor twice: once with the first lambda
// inside of 'lep' and again with the second lambda inside of 'lep'.
-// CHECK-DAG: @"\01??0?$H@V<lambda_1>@??$lep@X@@YAXXZ@@@QAE@XZ"
-// CHECK-DAG: @"\01??0?$H@V<lambda_2>@??$lep@X@@YAXXZ@@@QAE@XZ"
+// CHECK-DAG: @"\01??0?$H@V<lambda_1>@?0???$lep@X@@YAXXZ@@@QAE@XZ"
+// CHECK-DAG: @"\01??0?$H@V<lambda_2>@?0???$lep@X@@YAXXZ@@@QAE@XZ"
template <typename>
struct H {