Added cargo output

cargo.out

@@ -0,0 +1,25 @@
+   Compiling futuretest v0.1.0 (file:///mnt/c/Users/Mahmoud/git/futuretest)
+error[E0271]: type mismatch resolving `<futures::FutureResult<(), std::string::String> as futures::IntoFuture>::Error == &str`
+  --> src/main.rs:12:10
+   |
+12 |         .and_then(|_|
+   |          ^^^^^^^^ expected struct `std::string::String`, found &str
+   |
+   = note: expected type `std::string::String`
+              found type `&str`
+
+error[E0271]: type mismatch resolving `<futures::FutureResult<(), std::string::String> as futures::IntoFuture>::Error == &str`
+  --> src/main.rs:19:10
+   |
+19 |     core.run(f).unwrap();
+   |          ^^^ expected struct `std::string::String`, found &str
+   |
+   = note: expected type `std::string::String`
+              found type `&str`
+   = note: required because of the requirements on the impl of `futures::Future` for `futures::AndThen<futures::MapErr<futures::FutureResult<(), ()>, [closure@src/main.rs:11:18: 11:43]>, futures::FutureResult<(), std::string::String>, [closure@src/main.rs:12:19: 15:14]>`
+
+error: aborting due to 2 previous errors
+
+error: Could not compile `futuretest`.
+
+To learn more, run the command again with --verbose.