Extra assertions in eval_body_using_ecx to disallow queries for

functions that does allocations

compiler/rustc_middle/src/mir/interpret/mod.rs

@@ -132,7 +132,6 @@ pub use self::pointer::{Pointer, PointerArithmetic};
 /// Uniquely identifies one of the following:
 /// - A constant
 /// - A static
-/// - A const fn where all arguments (if any) are zero-sized types
 #[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, TyEncodable, TyDecodable)]
 #[derive(HashStable, Lift)]
 pub struct GlobalId<'tcx> {

compiler/rustc_mir/src/const_eval/eval_queries.rs

@@ -30,6 +30,13 @@ fn eval_body_using_ecx<'mir, 'tcx>(
     body: &'mir mir::Body<'tcx>,
 ) -> InterpResult<'tcx, MPlaceTy<'tcx>> {
     debug!("eval_body_using_ecx: {:?}, {:?}", cid, ecx.param_env);
+    assert!(
+        cid.promoted.is_some()
+            || matches!(
+                ecx.tcx.hir().body_const_context(def_id),
+                Some(ConstContext::Const | ConstContext::Static(_))
+            )
+    );
     let tcx = *ecx.tcx;
     let layout = ecx.layout_of(body.return_ty().subst(tcx, cid.instance.substs))?;
     assert!(!layout.is_unsized());