Auto merge of #145181 - Borgerr:remove-fixme-from-has-sigdrop, r=<try>

remove FIXME block from `has_significant_drop`, can handle inference

Author: rust-bors[bot]

compiler/rustc_middle/src/ty/util.rs

@@ -1375,14 +1375,6 @@ impl<'tcx> Ty<'tcx> {
                     _ => self,
                 };
 
-                // FIXME(#86868): We should be canonicalizing, or else moving this to a method of inference
-                // context, or *something* like that, but for now just avoid passing inference
-                // variables to queries that can't cope with them. Instead, conservatively
-                // return "true" (may change drop order).
-                if query_ty.has_infer() {
-                    return true;
-                }
-
                 // This doesn't depend on regions, so try to minimize distinct
                 // query keys used.
                 let erased = tcx.normalize_erasing_regions(typing_env, query_ty);

tests/ui/type-inference/has_sigdrop.rs

@@ -0,0 +1,18 @@
+//@ run-pass
+// Inference, canonicalization, and significant drops should work nicely together.
+// Related issue: #86868
+
+#[clippy::has_significant_drop]
+struct DropGuy {}
+
+fn creator() -> DropGuy {
+    DropGuy {}
+}
+
+fn dropper() {
+    let _ = creator();
+}
+
+fn main() {
+    dropper();
+}