Rollup merge of rust-lang#102181 - inquisitivecrystal:issue-100878-test, r=Mark-Simulacrum

Add regression test

This adds a regression test for issue rust-lang#100878.

Closes rust-lang#100878.

Author: fee1-dead

src/test/ui/consts/const-eval/issue-100878.rs

@@ -0,0 +1,8 @@
+// This checks that the const-eval ICE in issue #100878 does not recur.
+//
+// build-pass
+pub fn bitshift_data(data: [u8; 1]) -> u8 {
+    data[0] << 8
+}
+
+fn main() {}