Use ty::List instead of InternalSubsts

Author: oli-obk

compiler/rustc_lint/src/non_fmt_panic.rs

@@ -5,7 +5,6 @@ use rustc_hir as hir;
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
-use rustc_middle::ty::subst::InternalSubsts;
 use rustc_parse_format::{ParseMode, Parser, Piece};
 use rustc_session::lint::FutureIncompatibilityReason;
 use rustc_span::edition::Edition;
@@ -154,15 +153,11 @@ fn check_panic<'tcx>(cx: &LateContext<'tcx>, f: &'tcx hir::Expr<'tcx>, arg: &'tc
             let infcx = cx.tcx.infer_ctxt().build();
             let suggest_display = is_str
                 || cx.tcx.get_diagnostic_item(sym::Display).map(|t| {
-                    infcx
-                        .type_implements_trait(t, ty, InternalSubsts::empty(), cx.param_env)
-                        .may_apply()
+                    infcx.type_implements_trait(t, ty, ty::List::empty(), cx.param_env).may_apply()
                 }) == Some(true);
             let suggest_debug = !suggest_display
                 && cx.tcx.get_diagnostic_item(sym::Debug).map(|t| {
-                    infcx
-                        .type_implements_trait(t, ty, InternalSubsts::empty(), cx.param_env)
-                        .may_apply()
+                    infcx.type_implements_trait(t, ty, ty::List::empty(), cx.param_env).may_apply()
                 }) == Some(true);
 
             let suggest_panic_any = !is_str && panic == sym::std_panic_macro;