Restore order of lowerings

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt

@@ -115,10 +115,10 @@ val jvmPhases = namedIrFilePhase<JvmBackendContext>(
             makePatchParentsPhase(1) then
 
             enumWhenPhase then
+            singletonReferencesPhase then
             localDeclarationsPhase then
             singleAbstractMethodPhase then
             addContinuationPhase then
-            singletonReferencesPhase then
             callableReferencePhase then
             functionNVarargInvokePhase then
 

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt

@@ -169,6 +169,8 @@ private class AddContinuationLowering(private val context: JvmBackendContext) :
         invokeSuspend: IrFunction,
         invokeToOverride: IrSimpleFunctionSymbol
     ) {
+        val unitClass = context.irBuiltIns.unitClass
+        val unitField = context.declarationFactory.getFieldForObjectInstance(unitClass.owner)
         addFunctionOverride(invokeToOverride.owner).also { function ->
             function.body = context.createIrBuilder(function.symbol).irBlockBody {
                 +irReturn(irCall(invokeSuspend).also { invokeSuspendCall ->
@@ -178,7 +180,7 @@ private class AddContinuationLowering(private val context: JvmBackendContext) :
                             it.putValueArgument(index, irGet(param))
                         }
                     }
-                    invokeSuspendCall.putValueArgument(0, irUnit())
+                    invokeSuspendCall.putValueArgument(0, irGetField(null, unitField))
                 })
             }
         }