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https://github.com/rust-lang/rust-clippy
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use TyS::walk
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parent
b27cbda32b
commit
e322c773e3
2 changed files with 17 additions and 12 deletions
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@ -1504,9 +1504,7 @@ fn is_normalizable_helper<'tcx>(
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cache.insert(ty, false); // prevent recursive loops
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let result = cx.tcx.infer_ctxt().enter(|infcx| {
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let cause = rustc_middle::traits::ObligationCause::dummy();
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if infcx.at(&cause, param_env).normalize(ty).is_err() {
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false
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} else {
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if infcx.at(&cause, param_env).normalize(ty).is_ok() {
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match ty.kind() {
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ty::Adt(def, substs) => !def.variants.iter().any(|variant| {
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variant
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@ -1514,16 +1512,15 @@ fn is_normalizable_helper<'tcx>(
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.iter()
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.any(|field| !is_normalizable_helper(cx, param_env, field.ty(cx.tcx, substs), cache))
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}),
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ty::Ref(_, pointee, _) | ty::RawPtr(ty::TypeAndMut { ty: pointee, .. }) => {
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is_normalizable_helper(cx, param_env, pointee, cache)
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},
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ty::Array(inner_ty, _) | ty::Slice(inner_ty) => is_normalizable_helper(cx, param_env, inner_ty, cache),
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ty::Tuple(tys) => !tys.iter().any(|inner| match inner.unpack() {
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GenericArgKind::Type(inner_ty) => !is_normalizable_helper(cx, param_env, inner_ty, cache),
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_ => false,
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_ => !ty.walk().any(|generic_arg| !match generic_arg.unpack() {
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GenericArgKind::Type(inner_ty) if inner_ty != ty => {
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is_normalizable_helper(cx, param_env, inner_ty, cache)
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},
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_ => true, // if inner_ty == ty, we've already checked it
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}),
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_ => true,
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}
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} else {
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false
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}
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});
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cache.insert(ty, result);
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@ -13,11 +13,19 @@ pub struct RuleEdges<R: Rule> {
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type RuleDependencyEdges<R> = HashMap<u32, RuleEdges<R>>;
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// and additional potential variants
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// reproducer from the GitHub issue ends here
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// but check some additional variants
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type RuleDependencyEdgesArray<R> = HashMap<u32, [RuleEdges<R>; 8]>;
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type RuleDependencyEdgesSlice<R> = HashMap<u32, &'static [RuleEdges<R>]>;
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type RuleDependencyEdgesRef<R> = HashMap<u32, &'static RuleEdges<R>>;
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type RuleDependencyEdgesRaw<R> = HashMap<u32, *const RuleEdges<R>>;
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type RuleDependencyEdgesTuple<R> = HashMap<u32, (RuleEdges<R>, RuleEdges<R>)>;
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// and an additional checks to make sure fix doesn't have stack-overflow issue
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// on self-containing types
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pub struct SelfContaining {
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inner: Box<SelfContaining>,
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}
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type SelfContainingEdges = HashMap<u32, SelfContaining>;
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fn main() {}
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