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rustc_mir: disallow non-monomorphic reifications.

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This commit is contained in:
Eduard-Mihai Burtescu 2019-08-12 20:23:57 +03:00
parent ceabe0dc54
commit 7d9af83ffc
1 changed files with 11 additions and 1 deletions
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12
src/librustc_mir/interpret/cast.rs
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@ -1,4 +1,4 @@
use rustc::ty::{self, Ty, TypeAndMut};
use rustc::ty::{self, Ty, TypeAndMut, TypeFoldable};
use rustc::ty::layout::{self, TyLayout, Size};
use rustc::ty::adjustment::{PointerCast};
use syntax::ast::FloatTy;
@ -36,6 +36,11 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// The src operand does not matter, just its type
match src.layout.ty.sty {
ty::FnDef(def_id, substs) => {
// All reifications must be monomorphic, bail out otherwise.
if src.layout.ty.needs_subst() {
throw_inval!(TooGeneric);
}
if self.tcx.has_attr(def_id, sym::rustc_args_required_const) {
bug!("reifying a fn ptr that requires const arguments");
}
@ -62,6 +67,11 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// The src operand does not matter, just its type
match src.layout.ty.sty {
ty::Closure(def_id, substs) => {
// All reifications must be monomorphic, bail out otherwise.
if src.layout.ty.needs_subst() {
throw_inval!(TooGeneric);
}
let instance = ty::Instance::resolve_closure(
*self.tcx,
def_id,