Escaping \\ in snippet using \\\\ outputs only one backslash

[LCAR979]

• VSCode Version: 1.15.1, Commit 41abd2
• OS Version: Ubuntu 16.04

Steps to Reproduce:

1. Insert the following code snippet to latex.json (which is where user's tex snippet goes)
   Or by clicking File -> Preferences->User Snippets and search tex.

	"Input a multiline eqn": {
		"prefix": "eqnmultiline",
		"body": [
			"\\[",
			"\t\\begin{array}{lcl}",
			"\t\t ${1:foo} & = & ${2:foo} \\\\",
			"\t\t & = & ${3:foo} \\\\",
			"\t\t & = & ${4:foo} \\\\",
			"\t\\end{array}",
			"\\]",
			"$0"
		],
		"description": "Input a multiline eqn"
	}

2. In a demo.tex, type eqnmultiline which will insert a code snippet as follows:

   \[
        \begin{array}{lcl}
             foo & = & foo \
             & = & foo \
             & = & foo \
        \end{array}
    \]

And I'm expecting a \\ at the end of the three foo lines, which I use \\\\ to escape. But the result is one \ at each line.
Snippet Grammer says using \ to escape \. So I'm wondering if this is a bug.

Reproduces without extensions:
Correct Sorry for not testing using suggested code --disable-extensions before because I missed that line in comment . Tried it today and after disabling extensions, I cannot insert tex snippets even through Command Palette. It tells me there are no entries to pick from

[jrieken]

Sorry for the mess... This dupe #32020 (comment) but in short this is the problem

• In TextMate you can but must not escape a backslash with a backslash, so to insert 1 backslash have either \ or \\
• In JSON you must escape a backslash with another backslash, so to insert 1 backslash have either \\ or \\\\, to insert 2 \\\\\\\\

There are idea to move away from JSON for this and other escaping challenges...