chore: mark TypeInfo derived impl as automatically_derived

[saiintbrisson]

As per rust-lang/rust#120185, functions with their enclosing impl body marked as #[automatically_derived] won't be featured in coverage reports.

An example:

[saiintbrisson]

@niklasad1 fixed the lifetimes clippy complained about

[saiintbrisson]

It keeps failing for other reasons, ill look it up later and fix everything

[saiintbrisson]

@niklasad1 hi again, paritytech/parity-scale-codec#653 disallowed duplicate indexes for variants. I switched the numbers and it should be good to go. I made this PR through the file editor in GitHub so I haven't tested it.

[niklasad1]

hey @saiintbrisson again sorry about the CI mess that you are running into

The start attribute has been removed and can be replaced with the following patch:

diff --git a/test_suite/derive_tests_no_std/src/main.rs b/test_suite/derive_tests_no_std/src/main.rs
index a5af8c4..ae09da5 100644
--- a/test_suite/derive_tests_no_std/src/main.rs
+++ b/test_suite/derive_tests_no_std/src/main.rs
@@ -12,12 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 #![allow(internal_features)]
-#![feature(lang_items, start)]
-#![feature(alloc_error_handler)]
+#![feature(lang_items, alloc_error_handler)]
 #![no_std]
+#![no_main]
 
-#[start]
-fn start(_argc: isize, _argv: *const *const u8) -> isize {
+pub extern "C" fn _start(_argc: isize, _argv: *const *const u8) -> isize {
     test();
     0
 }

[saiintbrisson]

hey @saiintbrisson again sorry about the CI mess that you are running into

The start attribute has been removed and can be replaced with the following patch:

diff --git a/test_suite/derive_tests_no_std/src/main.rs b/test_suite/derive_tests_no_std/src/main.rs
index a5af8c4..ae09da5 100644
--- a/test_suite/derive_tests_no_std/src/main.rs
+++ b/test_suite/derive_tests_no_std/src/main.rs
@@ -12,12 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 #![allow(internal_features)]
-#![feature(lang_items, start)]
-#![feature(alloc_error_handler)]
+#![feature(lang_items, alloc_error_handler)]
 #![no_std]
+#![no_main]
 
-#[start]
-fn start(_argc: isize, _argv: *const *const u8) -> isize {
+pub extern "C" fn _start(_argc: isize, _argv: *const *const u8) -> isize {
     test();
     0
 }

I don't think this is as simple. I'll take a look into it a bit later. _start does not receive args as it is the first to run, before __libc_start_main, and it requires targeting x86_64-unknown-none instead of linux-gnu, on the contrary the _start will be duplicated.

Does the code really require no_main for this test?

[niklasad1]

Does the code really require no_main for this test?

it might be wrong my bad but I think the test/check is to make sure that it runs/compiles for no-std

[niklasad1]

anyway, it's unrelated to this PR let's merge this and fix it another PR