jsx-no-script-url: Cannot read property 'type' of null

[AriPerkkio]

Hello, jsx-no-script-url rule seems to crash in certain cases. This issue was spotted by automated CI run - it is not blocking my development or anything. https://github.com/AriPerkkio/eslint-remote-tester/runs/1506856587?check_suite_focus=true

"eslint-plugin-react": "^7.21.5"

"extends": ["plugin:react/all"]

Minimal repro:

import React from 'react';

export default function MyComponent() {
  return <a href />;
}

Crash reports from real-world examples

Rule: jsx-no-script-url

Message: Cannot read property 'type' of null
Path: mertJF/tailblocks/src/blocks/blog/dark/a.js
Link

                  Photo booth fam kinfolk cold-pressed sriracha leggings
jianbing
                  microdosing tousled waistcoat.
                </p>
                <div className="flex items-center flex-wrap ">
                  <a href className={`text-${props.theme}-500 inline-flex
items-center md:mb-2 lg:mb-0`}>
                    Learn More
                    <svg
                      className="w-4 h-4 ml-2"
                      viewBox="0 0 24 24"
                      stroke="currentColor"

Error:
TypeError: Cannot read property 'type' of null
Occurred while linting <text>:28
    at hasJavaScriptProtocol(/home/runner/work/eslint-remote-tester/eslint-remote-tester/ci/node_modules/eslint-plugin-react/lib/rules/jsx-no-script-url.js:19:21)
    at JSXAttribute (/home/runner/work/eslint-remote-tester/eslint-remote-tester/ci/node_modules/eslint-plugin-react/lib/rules/jsx-no-script-url.js:81:86)
    at /home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/safe-emitter.js:45:58
    at Array.forEach (<anonymous>)
    at Object.emit (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/safe-emitter.js:45:38)
    at NodeEventGenerator.applySelector (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:254:26)
    at NodeEventGenerator.applySelectors (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:283:22)
    at NodeEventGenerator.enterNode (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:297:14)
    at CodePathAnalyzer.enterNode (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/code-path-analysis/code-path-analyzer.js:711:23)
    at /home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/linter.js:952:32

Rule: jsx-no-script-url

Message: Cannot read property 'type' of null
Path: mertJF/tailblocks/src/blocks/blog/dark/b.js
Link

              <p className="leading-relaxed mb-3">
                Photo booth fam kinfolk cold-pressed sriracha leggings jianbing
                microdosing tousled waistcoat.
              </p>
              <a href className={`text-${props.theme}-500 inline-flex
items-center`}>
                Learn More
                <svg
                  className="w-4 h-4 ml-2"
                  viewBox="0 0 24 24"
                  stroke="currentColor"

Error:
TypeError: Cannot read property 'type' of null
Occurred while linting <text>:21
    at hasJavaScriptProtocol (/home/runner/work/eslint-remote-tester/eslint-remote-tester/ci/node_modules/eslint-plugin-react/lib/rules/jsx-no-script-url.js:19:21)
    at JSXAttribute (/home/runner/work/eslint-remote-tester/eslint-remote-tester/ci/node_modules/eslint-plugin-react/lib/rules/jsx-no-script-url.js:81:86)
    at /home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/safe-emitter.js:45:58
    at Array.forEach (<anonymous>)
    at Object.emit (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/safe-emitter.js:45:38)
    at NodeEventGenerator.applySelector (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:254:26)
    at NodeEventGenerator.applySelectors (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:283:22)
    at NodeEventGenerator.enterNode (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/node-event-generator.js:297:14)
    at CodePathAnalyzer.enterNode (/home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/code-path-analysis/code-path-analyzer.js:711:23)
    at /home/runner/work/eslint-remote-tester/eslint-remote-tester/node_modules/eslint/lib/linter/linter.js:952:32