Also test projections

3 files changed, 18 insertions, 1 deletions

diff --git a/src/test/ui/consts/static_mut_containing_mut_ref2.rs b/src/test/ui/consts/static_mut_containing_mut_ref2.rs
index aa9bfb4aeab..aeb69b2652c 100644
--- a/src/test/ui/consts/static_mut_containing_mut_ref2.rs
+++ b/src/test/ui/consts/static_mut_containing_mut_ref2.rs
@@ -3,6 +3,6 @@
 static mut STDERR_BUFFER_SPACE: u8 = 0;
 
 pub static mut STDERR_BUFFER: () = unsafe { *(&mut STDERR_BUFFER_SPACE) = 42; };
-//~^ references in statics may only refer to immutable values
+//~^ ERROR references in statics may only refer to immutable values
 
 fn main() {}
diff --git a/src/test/ui/consts/static_mut_containing_mut_ref3.rs b/src/test/ui/consts/static_mut_containing_mut_ref3.rs
new file mode 100644
index 00000000000..0bc7faa9afd
--- /dev/null
+++ b/src/test/ui/consts/static_mut_containing_mut_ref3.rs
@@ -0,0 +1,8 @@
+#![feature(const_let)]
+
+static mut FOO: (u8, u8) = (42, 43);
+
+static mut BAR: () = unsafe { FOO.0 = 99; };
+//~^ ERROR could not evaluate static initializer
+
+fn main() {}
diff --git a/src/test/ui/consts/static_mut_containing_mut_ref3.stderr b/src/test/ui/consts/static_mut_containing_mut_ref3.stderr
new file mode 100644
index 00000000000..cae53c6fee9
--- /dev/null
+++ b/src/test/ui/consts/static_mut_containing_mut_ref3.stderr
@@ -0,0 +1,9 @@
+error[E0080]: could not evaluate static initializer
+  --> $DIR/static_mut_containing_mut_ref3.rs:5:31
+   |
+LL | static mut BAR: () = unsafe { FOO.0 = 99; };
+   |                               ^^^^^^^^^^ tried to modify a static's initial value from another static's initializer
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0080`.