1 files changed, 12 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/escope/node_modules/es6-weak-map/node_modules/es5-ext/math/acosh/shim.js b/tools/eslint/node_modules/escope/node_modules/es6-weak-map/node_modules/es5-ext/math/acosh/shim.js
new file mode 100644
index 0000000000..89a24b5d76
--- /dev/null
+++ b/tools/eslint/node_modules/escope/node_modules/es6-weak-map/node_modules/es5-ext/math/acosh/shim.js
@@ -0,0 +1,12 @@
+'use strict';
+
+var log = Math.log, sqrt = Math.sqrt;
+
+module.exports = function (x) {
+	if (isNaN(x)) return NaN;
+	x = Number(x);
+	if (x < 1) return NaN;
+	if (x === 1) return 0;
+	if (x === Infinity) return x;
+	return log(x + sqrt(x * x - 1));
+};