Skip traversal of null nodes

[jamiebuilds]

Fixes #2

[AprilArcus]

Tested, LGTM

[alanorozco]

Would really appreciate it if this fix was released :)

[jamiebuilds]

Sorry I'm not able to merge on this repo anymore

[treshugart]

For those needing a workaround without resorting to a local patch, you can attempt a try/catch:

import traverse from 'eslint-traverse';
import os from 'node:os';

// ...

try {
  traverse(context, program, ({ node }) => {
    // You should also guard here.
    if (!node) {
      return;
    }
  });
} catch (e) {
  const stack = e.stack.split(os.EOL).map(s => s.trim());
  const eslintTraverseBug = stack[1];
  if (
    !eslintTraverseBug.includes(
      'eslint-traverse/index.js:24:55'
    )
  ) {
    throw e;
  }
}