diff options
Diffstat (limited to 'compiler/rustc_middle/src/ty/instance.rs')
| -rw-r--r-- | compiler/rustc_middle/src/ty/instance.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs index 4748e961019..65574f5702b 100644 --- a/compiler/rustc_middle/src/ty/instance.rs +++ b/compiler/rustc_middle/src/ty/instance.rs @@ -10,6 +10,7 @@ use rustc_hir::lang_items::LangItem; use rustc_index::bit_set::FiniteBitSet; use rustc_macros::HashStable; use rustc_middle::ty::normalize_erasing_regions::NormalizationError; +use rustc_span::def_id::LOCAL_CRATE; use rustc_span::Symbol; use std::assert_matches::assert_matches; @@ -172,6 +173,11 @@ impl<'tcx> Instance<'tcx> { // If this a non-generic instance, it cannot be a shared monomorphization. self.args.non_erasable_generics(tcx, self.def_id()).next()?; + // compiler_builtins cannot use upstream monomorphizations. + if tcx.is_compiler_builtins(LOCAL_CRATE) { + return None; + } + match self.def { InstanceDef::Item(def) => tcx .upstream_monomorphizations_for(def) |