Don't drop parent substs when we have no generic parameters

compiler-errors · compiler-errors · commit 6e83da1a2d23 · 2022-08-22T04:28:02.000Z
diff --git a/compiler/rustc_typeck/src/astconv/mod.rs b/compiler/rustc_typeck/src/astconv/mod.rs
@@ -365,7 +365,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         // here and so associated type bindings will be handled regardless of whether there are any
         // non-`Self` generic parameters.
         if generics.params.is_empty() {
-            return (tcx.intern_substs(&[]), arg_count);
+            return (tcx.intern_substs(parent_substs), arg_count);
         }
 
         struct SubstsForAstPathCtxt<'a, 'tcx> {

Original file line number	Diff line number	Diff line change
`@@ -365,7 +365,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {`
`365`	`365`	`// here and so associated type bindings will be handled regardless of whether there are any`
`366`	`366`	// non-`Self` generic parameters.
`367`	`367`	`if generics.params.is_empty() {`
`368`		`- return (tcx.intern_substs(&[]), arg_count);`
	`368`	`+ return (tcx.intern_substs(parent_substs), arg_count);`
`369`	`369`	`}`
`370`	`370`
`371`	`371`	`struct SubstsForAstPathCtxt<'a, 'tcx> {`