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Gracefully handle normalization failures in the prospective inliner cycle detector

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This commit is contained in:
Oli Scherer 2022-05-12 08:22:36 +00:00
parent 3a08bd7873
commit af0a464311
1 changed files with 4 additions and 1 deletions
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5
compiler/rustc_mir_transform/src/inline/cycle.rs
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@ -45,7 +45,10 @@ crate fn mir_callgraph_reachable<'tcx>(
) -> bool {
trace!(%caller);
for &(callee, substs) in tcx.mir_inliner_callees(caller.def) {
let substs = caller.subst_mir_and_normalize_erasing_regions(tcx, param_env, substs);
let Ok(substs) = caller.try_subst_mir_and_normalize_erasing_regions(tcx, param_env, substs) else {
trace!(?caller, ?param_env, ?substs, "cannot normalize, skipping");
continue;
};
let Some(callee) = ty::Instance::resolve(tcx, param_env, callee, substs).unwrap() else {
trace!(?callee, "cannot resolve, skipping");
continue;