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, 25 insertions, 0 deletions

diff --git a/compiler/rustc_error_codes/src/error_codes/E0138.md b/compiler/rustc_error_codes/src/error_codes/E0138.md
new file mode 100644
index 000000000..3f5eaea9f
--- /dev/null
+++ b/compiler/rustc_error_codes/src/error_codes/E0138.md
@@ -0,0 +1,25 @@
+More than one function was declared with the `#[start]` attribute.
+
+Erroneous code example:
+
+```compile_fail,E0138
+#![feature(start)]
+
+#[start]
+fn foo(argc: isize, argv: *const *const u8) -> isize {}
+
+#[start]
+fn f(argc: isize, argv: *const *const u8) -> isize {}
+// error: multiple 'start' functions
+```
+
+This error indicates that the compiler found multiple functions with the
+`#[start]` attribute. This is an error because there must be a unique entry
+point into a Rust program. Example:
+
+```
+#![feature(start)]
+
+#[start]
+fn foo(argc: isize, argv: *const *const u8) -> isize { 0 } // ok!
+```