[Bug Report] Table - In certain circumstances, the width of table header gutter is 0, Causing the table to be misplaced

[Zkangmas]

Element UI version

2.11.1

OS/Browsers version

Windows10 / Chrome76

Vue version

2.6.10

Reproduction Link

https://codepen.io/zkangmas/pen/YzKqMEJ

Steps to reproduce

1. table initial data value assigned to []
2. Set the width of each table-column to ensure that the horizontal scrollbar can appear after step 4.
3. Set the height attribute of the table ensures that the vertical scrollbar can appear after step 4.
4. Update the data value of the table in asynchronous mode.
5. Observe the table header gutter

What is Expected?

The table header gutter can be set width correctly

What is actually happening?

The width of table header gutter is 0

[liangwenjie08]

Have you solved it ?

[Zkangmas]

Have you solved it ?

Need to call the doLayout method when the data is updated.

This code should come back in table.vue

[xiaogaofudao]

升级 2.13.0 还是存在表头，表体 边框错位问题