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try {
eval(`
var bad = new RegExp(/[a--b]/v, "");
try { bad.exec("a"); } catch {}
new RegExp("[a--b]", "");
`)
} catch {}
try {
eval(`
var bad = new RegExp(/[a--b]/v, "");
try { bad.exec("a"); } catch {}
new RegExp("[a--b]", "");
`)
} catch {}