Add explanation message for E0224

1 files changed, 15 insertions, 0 deletions

diff --git a/src/librustc_error_codes/error_codes/E0224.md b/src/librustc_error_codes/error_codes/E0224.md
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index 00000000000..fd89c1d5256
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+++ b/src/librustc_error_codes/error_codes/E0224.md
@@ -0,0 +1,15 @@
+A trait object was declaired with no traits.
+
+Erroneous code example:
+
+```compile_fail,E0224
+type Foo = dyn 'static +;
+```
+
+Rust does not currently support this.
+
+To solve ensure the the trait object has at least one trait:
+
+```
+type Foo = dyn 'static + Copy;
+```