fix replace with delete

src/structs/AbstractItem.js

@@ -421,6 +421,13 @@ export class AbstractItem extends AbstractStruct {
       if (r.right !== null) {
         r.right.left = r
       }
+      if (r.left === null) {
+        if (r.parentSub === null) {
+          r.parent._start = r
+        } else {
+          r.parent._map.set(r.parentSub, r)
+        }
+      }
     }
     replaceStruct(y.store, this, r)
     return r

src/utils/Y.js

@@ -12,7 +12,8 @@ import {
   YText,
   YMap,
   YXmlFragment,
-  YEvent, ItemDeleted, GC, AbstractStruct // eslint-disable-line
+  ItemDeleted,
+  YEvent, GC, AbstractStruct // eslint-disable-line
 } from '../internals.js'
 
 import { Observable } from 'lib0/observable.js'
@@ -121,7 +122,7 @@ export class Y extends Observable {
                 if (deleteItem.clock + deleteItem.len < struct.id.clock) {
                   break
                 }
-                if (struct.deleted && struct instanceof AbstractItem) {
+                if (struct.deleted && struct instanceof AbstractItem && (struct.constructor !== ItemDeleted || (struct.parent._item !== null && struct.parent._item.deleted))) {
                   // check if we can GC
                   replacedItems.add(struct.gc(this))
                 }

tests/index.js

@@ -5,10 +5,17 @@ import * as text from './y-text.tests.js'
 import * as xml from './y-xml.tests.js'
 
 import { runTests } from 'lib0/testing.js'
-import { isBrowser } from 'lib0/environment.js'
+import { isBrowser, isNode } from 'lib0/environment.js'
 import * as log from 'lib0/logging.js'
 
 if (isBrowser) {
   log.createVConsole(document.body)
 }
-runTests({ map, array, text, xml })
+runTests({
+  map, array, text, xml
+}).then(success => {
+  /* istanbul ignore next */
+  if (isNode) {
+    process.exit(success ? 0 : 1)
+  }
+})