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, 15 insertions, 0 deletions

diff --git a/compiler/rustc_error_codes/src/error_codes/E0067.md b/compiler/rustc_error_codes/src/error_codes/E0067.md
new file mode 100644
index 000000000..11041bb53
--- /dev/null
+++ b/compiler/rustc_error_codes/src/error_codes/E0067.md
@@ -0,0 +1,15 @@
+An invalid left-hand side expression was used on an assignment operation.
+
+Erroneous code example:
+
+```compile_fail,E0067
+12 += 1; // error!
+```
+
+You need to have a place expression to be able to assign it something. For
+example:
+
+```
+let mut x: i8 = 12;
+x += 1; // ok!
+```