Mark lambda in use-after-scope-capture.cpp as noinline

[aeubanks]

Summary

As explained in https://bugs.llvm.org/show_bug.cgi?id=46208,
symbolization on Windows after inlining and around
lambdas/std::functions doesn't work very well. Under the new pass
manager, there is inlining at -O1.
use-after-scope-capture.cpp checks that the symbolization points to the
line containing "return x;", but the combination of
Windows/inlining/lambdas makes the symbolization point to the line
"f = [&x]() {".

Mark the lambda as noinline since this test is not a test for
symbolization.

[vitalybuka]

compiler-rt/test/asan/TestCases/use-after-scope-capture.cpp

6

it's not a test for symbolizer
so maybe just use noinline everywhere without any TODO

[aeubanks]

Always mark lambda noinline

compiler-rt/test/asan/TestCases/use-after-scope-capture.cpp

 // RUN: %clangxx_asan %stdcxx11 -O1 -fsanitize-address-use-after-scope %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
+// TODO(https://bugs.llvm.org/show_bug.cgi?id=46208): remove once Windows/inlining/lambda symbolization issues are resolved
+#ifdef _WIN32
+#define ATTR __attribute__((noinline))
+#else
+#define ATTR
+#endif
+
 #include <functional>
 
 int main() {
   std::function<int()> f;
   {
     int x = 0;
-    f = [&x]() {
+    f = [&x]() ATTR {
       return x;  // BOOM
       // CHECK: ERROR: AddressSanitizer: stack-use-after-scope
       // CHECK: #0 0x{{.*}} in {{.*}}use-after-scope-capture.cpp:[[@LINE-2]]
     };
   }
   return f();  // BOOM
 }