Fix chrono crash due to empty param_env

2018-05-21 17:45:48 +02:00
parent 0a368b467e
commit 74be5632a3
2 changed files with 20 additions and 2 deletions
--- a/clippy_lints/src/needless_pass_by_value.rs
+++ b/clippy_lints/src/needless_pass_by_value.rs
@@ -200,8 +200,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessPassByValue {
                    let sugg = |db: &mut DiagnosticBuilder| {
                        if let ty::TypeVariants::TyAdt(def, ..) = ty.sty {
                            if let Some(span) = cx.tcx.hir.span_if_local(def.did) {
-                                let param_env = ty::ParamEnv::empty();
-                                if param_env.can_type_implement_copy(cx.tcx, ty).is_ok() {
+                                if cx.param_env.can_type_implement_copy(cx.tcx, ty).is_ok() {
                                    db.span_help(span, "consider marking this type as Copy");
                                }
                            }