fix(core-base): wrong list index resolving on jit optimization (#1571)

Author: kazupon

packages/core-base/src/format.ts

@@ -86,7 +86,7 @@ function formatMessagePart<Message = string>(
       return ctx.interpolate(ctx.named(named.k || named.key))
     case NodeTypes.List:
       const list = node as ListNode
-      return ctx.interpolate(ctx.list(list.i || list.index))
+      return ctx.interpolate(ctx.list(list.i != null ? list.i : list.index))
     case NodeTypes.Linked:
       const linked = node as LinkedNode
       const modifier = linked.m || linked.modifier

packages/core-base/test/compilation.test.ts

@@ -88,6 +88,19 @@ describe('compile', () => {
     })
   })
 
+  test('list issue', () => {
+    const { ast } = baseCompile('hello {0}!', {
+      location: false,
+      jit: true,
+      minify: true
+    })
+    const msg = compile(ast, DEFAULT_CONTEXT)
+    const ctx = context({
+      list: ['kazupon']
+    })
+    expect(msg(ctx)).toBe('hello kazupon!')
+  })
+
   test('error', () => {
     let occured = false
     compile('hello {name!', {