auto merge of #17508 : vberger/rust/stability_lint_for_nested_macros, r=pnkfelix

Finishes the job of #17286.

Now the stability lint will successfully detect patterns such as:
```
first_macro!(second_macro!(deprecated_function()));
```
```
macro_rules! foo (
    ($e: expr) => (bar!($e))
)
foo!(deprected_function());
```
and
```
println!("{}", deprecated_function());
```
even with more levels of nesting, such as
```
println!("{}", foo!(bar!(deprecated_function())));
```

1 files changed, 1 insertions, 0 deletions

diff --git a/src/test/compile-fail/lint-stability.rs b/src/test/compile-fail/lint-stability.rs
index 6a36e270740..fdb0d801164 100644
--- a/src/test/compile-fail/lint-stability.rs
+++ b/src/test/compile-fail/lint-stability.rs
@@ -116,6 +116,7 @@ mod cross_crate {
         // on macros themselves are not yet linted.
         macro_test!();
         macro_test_arg!(deprecated_text()); //~ ERROR use of deprecated item: text
+        macro_test_arg!(macro_test_arg!(deprecated_text())); //~ ERROR use of deprecated item: text
         macro_test_arg_nested!(deprecated_text);
     }