\\G matches unicode character 0xFFFF

[RedCMD]

create a grammar with a rule containing \\G

"match": "\\G",
"name": "invalid"

run the grammar on a file containing the unicode character 0xFFFF �

expected:
it doesn't match anything, as there are no \\G anchors available

actual:
it matches the unicode char 0xFFFF

abc�def

the char does actually pop up in multiple files inside VSCode
so this is not a non-issue issue

[senyai]

As far as I understand, it is because of this logic:

vscode-textmate/src/rule.ts

Lines 692 to 696 in 09effd8

	} else if (nextCh === 'G') {
	A0_G0_result[pos + 1] = '\uFFFF';
	A0_G1_result[pos + 1] = 'G';
	A1_G0_result[pos + 1] = '\uFFFF';
	A1_G1_result[pos + 1] = 'G';

. Can it be done smarter? Not sure.