### Version 3.0.11 ### Reproduction link [SFC Link](https://sfc.vuejs.org/#eyJBcHAudnVlIjoiPHRlbXBsYXRlPlxuIFx0PHRyYW5zaXRpb24+XG4gIFx0PGRpdiB2LWlmPVwiZmFsc2VcIj5cbiAgICAgIDFcbiAgICA8L2Rpdj5cbiAgICA8IS0tQ29tbWVudC0tPlxuICAgIDxkaXYgdi1lbHNlPlxuICAgICAgMlxuICAgIDwvZGl2PlxuICA8L3RyYW5zaXRpb24+XG48L3RlbXBsYXRlPlxuXG48c2NyaXB0IHNldHVwPlxuY29uc3QgbXNnID0gJ0hlbGxvIFdvcmxkISdcbjwvc2NyaXB0PiJ9) ### Steps to reproduce Just put down a comment in a transition tag. ### What is expected? Comments should be ignored ### What is actually happening? It is throwing a "<transition> can only be used on a single element or component" error. <!-- generated by vue-issues. DO NOT REMOVE -->
