make sure we still eagerly emit errors

compiler/rustc_mir_build/src/thir/cx/expr.rs

@@ -652,7 +652,8 @@ impl<'tcx> Cx<'tcx> {
                                     promoted: None,
                                 },
                                 tcx.type_of(anon_const.def_id).instantiate_identity(),
-                            );
+                            )
+                            .normalize(tcx, self.param_env);
                             let span = tcx.def_span(anon_const.def_id);
 
                             InlineAsmOperand::Const { value, span }
@@ -668,7 +669,8 @@ impl<'tcx> Cx<'tcx> {
                                     promoted: None,
                                 },
                                 tcx.type_of(anon_const.def_id).instantiate_identity(),
-                            );
+                            )
+                            .normalize(tcx, self.param_env);
                             let span = tcx.def_span(anon_const.def_id);
 
                             InlineAsmOperand::SymFn { value, span }

tests/ui/asm/const-error.rs

@@ -0,0 +1,15 @@
+// only-x86_64
+// needs-asm-support
+
+#![feature(asm_const)]
+
+// Test to make sure that we emit const errors eagerly for inline asm
+
+use std::arch::asm;
+
+fn test<T>() {
+    unsafe { asm!("/* {} */", const 1 / 0); }
+    //~^ ERROR evaluation of
+}
+
+fn main() {}

tests/ui/asm/const-error.stderr

@@ -0,0 +1,9 @@
+error[E0080]: evaluation of `test::<T>::{constant#0}` failed
+  --> $DIR/const-error.rs:11:37
+   |
+LL |     unsafe { asm!("/* {} */", const 1 / 0); }
+   |                                     ^^^^^ attempt to divide `1_i32` by zero
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0080`.