Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/compiler/rustc_error_codes/src/error_codes/E0705.md b/compiler/rustc_error_codes/src/error_codes/E0705.md
new file mode 100644
index 000000000..eb76d1836
--- /dev/null
+++ b/compiler/rustc_error_codes/src/error_codes/E0705.md
@@ -0,0 +1,11 @@
+A `#![feature]` attribute was declared for a feature that is stable in the
+current edition, but not in all editions.
+
+Erroneous code example:
+
+```rust2018,compile_fail,E0705
+#![feature(rust_2018_preview)]
+#![feature(test_2018_feature)] // error: the feature
+                               // `test_2018_feature` is
+                               // included in the Rust 2018 edition
+```