Add regression test for ice

tests/ui/pattern/const-error-ice-issue-148542.rs

@@ -0,0 +1,13 @@
+//@ edition: 2021
+
+// Regression test for #148542
+// Ensure we don't ICE with "Invalid `ConstKind` for `const_to_pat`: {const error}"
+
+fn foo() where &str:, {
+    //~^ ERROR `&` without an explicit lifetime name cannot be used here
+    match 42_u8 {
+        -10.. => {}
+    }
+}
+
+fn main() {}

tests/ui/pattern/const-error-ice-issue-148542.stderr

@@ -0,0 +1,14 @@
+error[E0637]: `&` without an explicit lifetime name cannot be used here
+  --> $DIR/const-error-ice-issue-148542.rs:6:16
+   |
+LL | fn foo() where &str:, {
+   |                ^ explicit lifetime name needed here
+   |
+help: consider introducing a higher-ranked lifetime here
+   |
+LL | fn foo() where for<'a> &'a str:, {
+   |                +++++++  ++
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0637`.