fix: mark the last statement in do block as completion

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment--es2015/completion-do-expression/exec.js

@@ -0,0 +1,9 @@
+var result;
+class C {
+  static #x;
+  static {
+    var x;
+    result = do { ({#x: x = 2} = C); }
+  }
+}
+expect(result).toBe(C);

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment--es2015/completion-do-expression/input.js

@@ -0,0 +1,8 @@
+var result;
+class C {
+  static #x;
+  static {
+    var x;
+    result = do { ({#x: x = 2} = C); }
+  }
+}

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment--es2015/completion-do-expression/options.json

@@ -0,0 +1,10 @@
+{
+  "plugins": [
+    "proposal-do-expressions",
+    "proposal-destructuring-private",
+    "proposal-class-static-block",
+    "proposal-class-properties",
+    "proposal-private-methods",
+    ["proposal-object-rest-spread", { "useBuiltIns": true }]
+  ]
+}

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment--es2015/completion-do-expression/output.js

@@ -0,0 +1,15 @@
+var result;
+
+class C {}
+
+var _x = {
+  writable: true,
+  value: void 0
+};
+
+(() => {
+  var _m, _m2;
+
+  var x;
+  result = (_m = C, _m2 = babelHelpers.classStaticPrivateFieldSpecGet(_m, C, _x), x = _m2 === void 0 ? 2 : _m2, _m);
+})();

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment/completion-do-expression/exec.js

@@ -0,0 +1,9 @@
+var result;
+class C {
+  static #x;
+  static {
+    var x;
+    result = do { ({#x: x = 2} = C); }
+  }
+}
+expect(result).toBe(C);

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment/completion-do-expression/input.js

@@ -0,0 +1,8 @@
+var result;
+class C {
+  static #x;
+  static {
+    var x;
+    result = do { ({#x: x = 2} = C); }
+  }
+}

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment/completion-do-expression/options.json

@@ -0,0 +1,4 @@
+{
+  "plugins": ["proposal-do-expressions", "proposal-destructuring-private"],
+  "minNodeVersion": "16.11.0"
+}

packages/babel-plugin-proposal-destructuring-private/test/fixtures/assignment/completion-do-expression/output.js

@@ -0,0 +1,11 @@
+var result;
+
+class C {
+  static #x;
+  static {
+    var _m, _m2;
+
+    var x;
+    result = (_m = C, _m2 = _m.#x, x = _m2 === void 0 ? 2 : _m2, _m);
+  }
+}

packages/babel-traverse/src/path/introspection.ts

@@ -149,7 +149,11 @@ export function isCompletionRecord(
     if (Array.isArray(container) && path.key !== container.length - 1) {
       return false;
     }
-  } while ((path = path.parentPath) && !path.isProgram());
+  } while (
+    (path = path.parentPath) &&
+    !path.isProgram() &&
+    !path.isDoExpression()
+  );
 
   return true;
 }