From 79ef9718bb8e7b1fe45770a1ca43fb79bebbbbf0 Mon Sep 17 00:00:00 2001
From: Philipp Hansch <dev@phansch.net>
Date: Fri, 18 Jan 2019 16:46:51 +0100
Subject: [PATCH] Remove delay_span_bug from qualify_min_const_fn

This is causing issues with a new Clippy lint that will be able to
detect possible const functions.

As per https://github.com/rust-lang/rust-clippy/pull/3648#discussion_r247927450
---
 src/librustc_mir/transform/qualify_min_const_fn.rs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/librustc_mir/transform/qualify_min_const_fn.rs b/src/librustc_mir/transform/qualify_min_const_fn.rs
index 059b88a4d702a..85bf1e70ebf42 100644
--- a/src/librustc_mir/transform/qualify_min_const_fn.rs
+++ b/src/librustc_mir/transform/qualify_min_const_fn.rs
@@ -21,6 +21,7 @@ pub fn is_min_const_fn(
                 | Predicate::RegionOutlives(_)
                 | Predicate::TypeOutlives(_)
                 | Predicate::WellFormed(_)
+                | Predicate::Projection(_)
                 | Predicate::ConstEvaluatable(..) => continue,
                 | Predicate::ObjectSafe(_) => {
                     bug!("object safe predicate on function: {:#?}", predicate)
@@ -29,13 +30,6 @@ pub fn is_min_const_fn(
                     bug!("closure kind predicate on function: {:#?}", predicate)
                 }
                 Predicate::Subtype(_) => bug!("subtype predicate on function: {:#?}", predicate),
-                Predicate::Projection(_) => {
-                    let span = tcx.def_span(current);
-                    // we'll hit a `Predicate::Trait` later which will report an error
-                    tcx.sess
-                        .delay_span_bug(span, "projection without trait bound");
-                    continue;
-                }
                 Predicate::Trait(pred) => {
                     if Some(pred.def_id()) == tcx.lang_items().sized_trait() {
                         continue;