Index: node_modules/d3-geo/src/clip/buffer.js
===================================================================
--- node_modules/d3-geo/src/clip/buffer.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-geo/src/clip/buffer.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,24 @@
+import noop from "../noop.js";
+
+export default function() {
+  var lines = [],
+      line;
+  return {
+    point: function(x, y, m) {
+      line.push([x, y, m]);
+    },
+    lineStart: function() {
+      lines.push(line = []);
+    },
+    lineEnd: noop,
+    rejoin: function() {
+      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+    },
+    result: function() {
+      var result = lines;
+      lines = [];
+      line = null;
+      return result;
+    }
+  };
+}