1 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/feature-gates/trace_macros-gate.stderr b/tests/ui/feature-gates/trace_macros-gate.stderr
new file mode 100644
index 000000000..1ca10aeec
--- /dev/null
+++ b/tests/ui/feature-gates/trace_macros-gate.stderr
@@ -0,0 +1,49 @@
+error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
+  --> $DIR/trace_macros-gate.rs:4:5
+   |
+LL |     trace_macros!();
+   |     ^^^^^^^^^^^^
+   |
+   = note: see issue #29598 <https://github.com/rust-lang/rust/issues/29598> for more information
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
+
+error: trace_macros! accepts only `true` or `false`
+  --> $DIR/trace_macros-gate.rs:4:5
+   |
+LL |     trace_macros!();
+   |     ^^^^^^^^^^^^^^^
+
+error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
+  --> $DIR/trace_macros-gate.rs:6:5
+   |
+LL |     trace_macros!(true);
+   |     ^^^^^^^^^^^^
+   |
+   = note: see issue #29598 <https://github.com/rust-lang/rust/issues/29598> for more information
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
+
+error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
+  --> $DIR/trace_macros-gate.rs:7:5
+   |
+LL |     trace_macros!(false);
+   |     ^^^^^^^^^^^^
+   |
+   = note: see issue #29598 <https://github.com/rust-lang/rust/issues/29598> for more information
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
+
+error[E0658]: use of unstable library feature 'trace_macros': `trace_macros` is not stable enough for use and is subject to change
+  --> $DIR/trace_macros-gate.rs:10:26
+   |
+LL |         ($x: ident) => { trace_macros!($x) }
+   |                          ^^^^^^^^^^^^
+...
+LL |     expando!(true);
+   |     -------------- in this macro invocation
+   |
+   = note: see issue #29598 <https://github.com/rust-lang/rust/issues/29598> for more information
+   = help: add `#![feature(trace_macros)]` to the crate attributes to enable
+   = note: this error originates in the macro `expando` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 5 previous errors
+
+For more information about this error, try `rustc --explain E0658`.