Check types live across yields in generators too

1 files changed, 7 insertions, 0 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index 74345169179..bb96e135741 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -3018,6 +3018,13 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                     err.span_label(span, "this closure captures all values by move");
                 }
             }
+            ObligationCauseCode::SizedGeneratorInterior(generator_def_id) => {
+                let what = match self.tcx.generator_kind(generator_def_id) {
+                    None | Some(hir::GeneratorKind::Gen) => "yield",
+                    Some(hir::GeneratorKind::Async(..)) => "await",
+                };
+                err.note(format!("all values live across `{what}` must have a statically known size"));
+            }
             ObligationCauseCode::ConstPatternStructural => {
                 err.note("constants used for pattern-matching must derive `PartialEq` and `Eq`");
             }