Created attachment 4985 [details]
Rust 1.73 upgrade patch

The Rust Oe-selftest fails after upgarding from Rust 1.70 to 1.73(including 1.71 and 1.72) versions.

Steps to reproduce-
1. Clone poky sources
2. Apply rust-1.73.patch.
3. Add assert.patch for rust under meta/recipes-devtools/rust/files/
4. Add "file://assert.patch;patchdir=${RUSTSRC} \" in meta/recipes-devtools/rust/rust-source.inc file 	
3. source oe-init-build-env & set SANITY_TESTED_DISTROS="" in local.conf
4. oe-selftest -r rust.RustSelfTestSystemEmulated.test_rust

The failure log is 

At first, there's an assertion failure causing the failure-

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `x86_64-unknown-linux-gnu`,
 right: `x86_64-poky-linux-gnu`: Cannot obtain compiler for non-native build triple at stage 0', compile.rs:1474:13
Build completed unsuccessfully in 0:04:38

This assertion check can be by-passed by the assert.patch file.
After this, the build the oe-selftest proceeds untill it encounters other panics-

thread 'main' panicked at src/tools/compiletest/src/common.rs:499:23:                                                          
no entry found for key                                                                                                         
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
and
 
thread 'main' panicked at 'client.read_exact(&mut buf) failed with Connection reset by peer (os error 104)', src/tools/remote-test-client/src/main.rs:254:5                                                                                                   
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace 
Build completed unsuccessfully in 0:07:57
 
Please find attached the Rust 1.73 upgrade patch and assert.patch files.