Add "weird" test cases

clang/test/Preprocessor/embed_weird.cpp

@@ -98,3 +98,19 @@ constexpr unsigned char ch =
 #embed FILE_NAME limit(LIMIT) clang::offset(OFFSET) EMPTY_SUFFIX
 ;
 static_assert(ch == 0);
+
+void foobar(float x, char y, char z); // cxx-note {{candidate function not viable: requires 3 arguments, but 1 was provided}}
+                                      // c-note@-1 {{declared here}}
+void g1() { foobar((float) // cxx-error {{no matching function for call to 'foobar'}}
+#embed "numbers.txt" limit(3) // expected-warning {{left operand of comma operator has no effect}}
+); // c-error {{too few arguments to function call, expected 3, have 1}}
+}
+
+#if __cplusplus
+struct S { S(char x); ~S(); };
+void f1() {
+  S s[] = {
+#embed "null_byte.bin"
+  };
+}
+#endif