block editor - "Updating failed" if any text includes "$v()"

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If I include any of the following sequence of characters anywhere in any block in Wordpress, I get the red "Updating failed" error when I try to save the draft.

$v()

$xyz()

$x   ()

Any variety where it looks like $ followed by an identifier followed by the empty parentheses seems to trigger the problem. The following do NOT trigger the problem:

$x

$()

$  ()

Initially I thought it was because I was using a syntax highlighter plugin; I tried a different plugin and it still failed; and a post with no plugins used still exhibits the problem.

I've tried refresh the page and trying again. I've updated Wordpress to the latest version available (5.2.2).

本文标签： block editorquotUpdating failedquot if any text includes quotv()quot