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Merge check_mod_impl_wf and check_mod_type_wf

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This commit is contained in:
Oli Scherer 2024-02-15 17:12:05 +00:00
parent aa029ce4d8
commit 8206cffc48
63 changed files with 736 additions and 245 deletions
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9
compiler/rustc_traits/src/codegen.rs
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@ -6,7 +6,7 @@
use rustc_infer::infer::TyCtxtInferExt;
use rustc_infer::traits::{FulfillmentErrorCode, TraitEngineExt as _};
use rustc_middle::traits::CodegenObligationError;
use rustc_middle::ty::{self, TyCtxt};
use rustc_middle::ty::{self, TyCtxt, TypeVisitableExt};
use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt;
use rustc_trait_selection::traits::{
ImplSource, Obligation, ObligationCause, SelectionContext, TraitEngine, TraitEngineExt,
@ -72,6 +72,13 @@ pub fn codegen_select_candidate<'tcx>(
let impl_source = infcx.resolve_vars_if_possible(impl_source);
let impl_source = infcx.tcx.erase_regions(impl_source);
if impl_source.has_infer() {
// Unused lifetimes on an impl get replaced with inference vars, but never resolved,
// causing the return value of a query to contain inference vars. We do not have a concept
// for this and will in fact ICE in stable hashing of the return value. So bail out instead.
infcx.tcx.dcx().has_errors().unwrap();
return Err(CodegenObligationError::FulfillmentError);
}
Ok(&*tcx.arena.alloc(impl_source))
}