Merged tests/ui/str/str-add-operator-2.rs with

tests/ui/str/str-add-operator.rs

Author: reddevilmidzy

tests/ui/str/str-add-operator-2.rs

@@ -1,6 +1,11 @@
+//! regression test for issue #47377, #47380
 // ignore-tidy-tab
 fn main() {
  	let b = "hello";
  	let _a = b + ", World!";
  	//~^ ERROR E0369
+
+    let b = "hello";
+    println!("🦀🦀🦀🦀🦀"); let _a = b + ", World!";
+    //~^ ERROR E0369
 }

tests/ui/str/str-add-operator-2.stderr

@@ -1,5 +1,5 @@
 error[E0369]: cannot add `&str` to `&str`
-  --> $DIR/issue-47377.rs:4:14
+  --> $DIR/str-add-operator.rs:5:14
    |
 LL |      let _a = b + ", World!";
    |               - ^ ---------- &str
@@ -13,6 +13,21 @@ help: create an owned `String` from a string reference
 LL |      let _a = b.to_owned() + ", World!";
    |                +++++++++++
 
-error: aborting due to 1 previous error
+error[E0369]: cannot add `&str` to `&str`
+  --> $DIR/str-add-operator.rs:9:35
+   |
+LL |     println!("🦀🦀🦀🦀🦀"); let _a = b + ", World!";
+   |                                      - ^ ---------- &str
+   |                                      | |
+   |                                      | `+` cannot be used to concatenate two `&str` strings
+   |                                      &str
+   |
+   = note: string concatenation requires an owned `String` on the left
+help: create an owned `String` from a string reference
+   |
+LL |     println!("🦀🦀🦀🦀🦀"); let _a = b.to_owned() + ", World!";
+   |                                       +++++++++++
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0369`.