Rollup merge of #59462 - taiki-e:no-core, r=petrochenkov

Fix error in Rust 2018 + no_core environment

Minimized reproduction: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=5b9f6c3026ec9d856699fa6dbd4361f0

This is a fix for the error that occurred in #58702.

r? @Centril

1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/run-pass/no-core-2.rs b/src/test/run-pass/no-core-2.rs
new file mode 100644
index 00000000000..e09f8f6b7a8
--- /dev/null
+++ b/src/test/run-pass/no-core-2.rs
@@ -0,0 +1,18 @@
+#![allow(dead_code, unused_imports)]
+#![feature(no_core)]
+#![no_core]
+// edition:2018
+
+extern crate std;
+extern crate core;
+use core::{prelude::v1::*, *};
+
+fn foo() {
+    for _ in &[()] {}
+}
+
+fn bar() -> Option<()> {
+    None?
+}
+
+fn main() {}