fixed: riot/riot#3060

Author: GianlucaGuarini

misc.js

@@ -1,4 +1,4 @@
-import { ATTRIBUTE, VALUE } from './expression-types.js'
+import { ATTRIBUTE, VALUE, REF } from './expression-types.js'
 import { dashToCamelCase } from './strings.js'
 
 /**
@@ -37,6 +37,9 @@ export function evaluateAttributeExpressions(attributes) {
     const { value, type } = attribute
 
     switch (true) {
+      // ref attributes shouldn't be evaluated in the props
+      case attribute.type === REF:
+        break
       // spread attribute
       case !attribute.name && type === ATTRIBUTE:
         return {

misc.spec.js

@@ -1,5 +1,5 @@
 import { evaluateAttributeExpressions, memoize, panic } from './misc.js'
-import { ATTRIBUTE } from './expression-types.js'
+import { ATTRIBUTE, REF } from './expression-types.js'
 import { expect } from 'chai'
 
 describe('Misc', function () {
@@ -21,6 +21,16 @@ describe('Misc', function () {
     })
   })
 
+  it('evaluateAttributeExpressions (skip ref attributes)', () => {
+    expect(
+      evaluateAttributeExpressions([
+        {
+          type: REF,
+        },
+      ]),
+    ).to.be.deep.equal({})
+  })
+
   it('memoize', () => {
     let count = 0 // eslint-disable-line
     const increment = memoize(function () {