Do not ICE when suggesting elided lifetimes on non-existent spans.

2021-12-11 00:58:13 +01:00 · 2021-12-11 00:58:13 +01:00 · 9a68003742
commit 9a68003742
parent d9e997d9eb
1 changed files with 5 additions and 0 deletions
--- a/compiler/rustc_resolve/src/late/diagnostics.rs
+++ b/compiler/rustc_resolve/src/late/diagnostics.rs
@ -2115,6 +2115,11 @@ impl<'tcx> LifetimeContext<'_, 'tcx> {
                    })
                    .map(|(formatter, span)| (*span, formatter(name)))
                    .collect();
+                if spans_suggs.is_empty() {
+                    // If all the spans come from macros, we cannot extract snippets and then
+                    // `formatters` only contains None and `spans_suggs` is empty.
+                    return;
+                }
                err.multipart_suggestion_verbose(
                    &format!(
                        "consider using the `{}` lifetime",