Auto merge of #100024 - matthiaskrgr:rollup-36ab4wx, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #99340 (Fix ICE in Definitions::create_def)
 - #99629 (Improve `cannot move out of` error message)
 - #99864 (bootstrap: don't emit warn about duplicated deps with same/different features if some of sets actually empty)
 - #99911 (Remove some uses of `guess_head_span`)
 - #99976 (Make Rustdoc exit with correct error code when scraping examples from invalid files)
 - #100003 (Improve size assertions.)
 - #100012 (Avoid `Ty` to `String` conversions)
 - #100020 (better error when python is not found in x - issue #99648)

Failed merges:

 - #99994 (Replace `guess_head_span` with `opt_span`)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 3 insertions, 3 deletions

diff --git a/src/tools/x/src/main.rs b/src/tools/x/src/main.rs
index 57d548f313d..9187c3551d7 100644
--- a/src/tools/x/src/main.rs
+++ b/src/tools/x/src/main.rs
@@ -41,9 +41,9 @@ fn python() -> &'static str {
     } else if python2 {
         PYTHON2
     } else {
-        // We would have returned early if we found that python is installed ...
-        // maybe this should panic with an error instead?
-        PYTHON
+        // Python was not found on path, so exit
+        eprintln!("Unable to find python in your PATH. Please check it is installed.");
+        process::exit(1);
     }
 }