SIGSEGV with ERR_TLS_REQUIRED_SERVER_NAME in Server.addContext

[bahmutov]

The Test Runner unexpectedly exited via a exit event with signal SIGSEGV

Please search Cypress documentation for possible solutions:

https://on.cypress.io

Check if there is a GitHub issue describing this crash:

https://github.com/cypress-io/cypress/issues

Consider opening a new issue.

----------

Platform: darwin (19.5.0)
Cypress Version: 5.6.0

GET /__cypress/tests?p=cypress/support/index.js 200 1268.985 ms - -
Error [ERR_TLS_REQUIRED_SERVER_NAME] [ERR_TLS_REQUIRED_SERVER_NAME]: "servername" is required parameter for Server.addContext
    at Server.addContext (_tls_wrap.js:1400:11)
    at /Users/gleb/Library/Caches/Cypress/5.6.0/Cypress.app/Contents/Resources/app/packages/https-proxy/lib/server.js:222:23
    at tryCatcher (/Users/gleb/Library/Caches/Cypress/5.6.0/Cypress.app/Contents/Resources/app/packages/https-proxy/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/gleb/Library/Caches/Cypress/5.6.0/Cypress.app/Contents/Resources/app/packages/https-proxy/node_modules/bluebird/js/release/promise.js:512:31)

Relevant code from packages/https-proxy/lib/server.js

  _getPortFor (hostname) {
    return this._getCertificatePathsFor(hostname)
    .catch((err) => {
      return this._generateMissingCertificates(hostname)
    }).then((data = {}) => {
      if (net.isIP(hostname)) {
        return this._getServerPortForIp(hostname, data)
      }

      this._sniServer.addContext(hostname, data) // line 222

      return this._sniPort
    })
  }

Reproduction steps:

• clone https://github.com/cypress-io/cypress-fiddle
• checkout branch sigsegv
• npm install
• npm run cy:md
• click on any file

What is happening I think: the test tries to include a script pointing at external CDN https: //cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.bundle.min.js in the iframe, which seems to crash badly.

[bahmutov]

More relevant logs

$ DEBUG=cypress:https-proxy npm run cy:md

> @cypress/fiddle@0.0.0-development cy:md /Users/gleb/git/cypress-fiddle
> cypress open --config-file cypress-markdown.json

  cypress:https-proxy Created SNI HTTPS Proxy Server { port: 53618 } +0ms
GET /__/ 200 9.035 ms - -
GET /__cypress/runner/cypress_runner.css 200 3.791 ms - -
GET /__cypress/runner/cypress_runner.js 200 1.796 ms - -
  cypress:https-proxy Writing browserSocket connection headers { url: 'localhost:53616', headLength: 0, headers: { host: 'localhost:53616', 'proxy-connection': 'keep-alive', 'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Cypress/5.6.0 Chrome/85.0.4183.121 Electron/10.1.5 Safari/537.36' } } +3s
  cypress:https-proxy Got first head bytes { url: 'localhost:53616', head: 'GET /__socket.io/?EIO=3&transport=websocket HTTP/1.1\r\nHost: loca' } +4ms
  cypress:https-proxy Making intercepted connection to 53616 +0ms
  cypress:https-proxy received upstreamSocket callback for request { port: 53616, hostname: 'localhost', err: undefined } +1ms
GET /__cypress/iframes/integration/contains-example.md 200 2.715 ms - 902
GET /__cypress/runner/fonts/fa-solid-900.woff2 200 1.184 ms - 76120
Browserslist: caniuse-lite is outdated. Please run:
npx browserslist@latest --update-db
GET /__cypress/tests?p=cypress/integration/contains-example.md 200 1196.854 ms - -
GET /__cypress/tests?p=cypress/support/index.js 200 1234.019 ms - -
  cypress:https-proxy Writing browserSocket connection headers { url: 'cdnjs.cloudflare.com:443', headLength: 0, headers: { host: 'cdnjs.cloudflare.com:443', 'proxy-connection': 'keep-alive', 'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Cypress/5.6.0 Chrome/85.0.4183.121 Electron/10.1.5 Safari/537.36' } } +2s
  cypress:https-proxy Writing browserSocket connection headers { url: 'code.jquery.com:443', headLength: 0, headers: { host: 'code.jquery.com:443', 'proxy-connection': 'keep-alive', 'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Cypress/5.6.0 Chrome/85.0.4183.121 Electron/10.1.5 Safari/537.36' } } +1ms
  cypress:https-proxy Got first head bytes { url: 'cdnjs.cloudflare.com:443', head: '\u0016\u0003\u0001\u0002\u0000\u0001\u0000\u0001�\u0003\u0003��5S\b.\u000e��<�r�b�\u0003\u0019n��N�R��i�22�=H ��̕��\u0003��!�@/l�\u0014�!\u0013�\r' } +1ms
  cypress:https-proxy Got first head bytes { url: 'code.jquery.com:443', head: '\u0016\u0003\u0001\u0002\u0000\u0001\u0000\u0001�\u0003\u0003\u0000�\u0006n;\u0004�A��H�Y��\u0010�׽���a�\u001c�\bh\u001b�Q� �pGS�hC��$J V�\t�9qڶ�' } +1ms
  cypress:https-proxy Writing browserSocket connection headers { url: '%20:443', headLength: 0, headers: { host: '%20:443', 'proxy-connection': 'keep-alive', 'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Cypress/5.6.0 Chrome/85.0.4183.121 Electron/10.1.5 Safari/537.36' } } +1ms
  cypress:https-proxy Got first head bytes { url: '%20:443', head: '\u0016\u0003\u0001\u0002\u0000\u0001\u0000\u0001�\u0003\u0003�xG�\u0018\u0014Z4\fЙ�U�e��\u001eD�I�\u0017�ul\t��\u001a� ��p�\u0018x�۷�Jd�6�\u00004��\u000e?�' } +0ms
  cypress:https-proxy Making intercepted connection to 53618 +2ms
  cypress:https-proxy Making intercepted connection to 53618 +1ms
  cypress:https-proxy received upstreamSocket callback for request { port: 53618, hostname: 'localhost', err: undefined } +0ms
  cypress:https-proxy received upstreamSocket callback for request { port: 53618, hostname: 'localhost', err: undefined } +1ms
Error [ERR_TLS_REQUIRED_SERVER_NAME] [ERR_TLS_REQUIRED_SERVER_NAME]: "servername" is required parameter for Server.addContext
    at Server.addContext (_tls_wrap.js:1400:11)

[rharmaning]

I'm hitting the same error. Recently upgraded my system to Catalina (tests on Mojave were running). Failing on Cypress 6.1.0 and now 6.2.0 as well. Blocks all test runs for me.

update: I'm getting the same error on another MacBook just updated to Big Sur

[HoracePGreeley]

I get the same error by running the tests on the Gitlab pipeline. The docker image cypress/browsers:node14.15.0-chrome86-ff82 is in use and the tests are executed in a headless chrome. Locally on my MacBook, all tests run successful.

[Emilemuny]

For those encountering this issue and is a blocker, here's a workaround I've added that seem to resolve the issue for now until it is officially fixed 👍

Go to the server.js file of the https-proxy package and add the below code right above this._sniServer.addContext(hostname, data).

if(hostname === '') { hostname = 'example.com'; // Used my SUT url in my case. };

[Aishwarya-UR]

Hi @Emilemuny - where can I find the https-proxy package you mentioned?

[Aishwarya-UR]

Found it: ..\Administrator\AppData\Local\Cypress\Cache\7.4.0\Cypress\resources\app\packages\https-proxy\lib - & this worked, thanks a lot..

[porkus1990]

Hi

is there any update on this? Have the same issue now and editing the lib is no option on CI.

[tarponjargon]

This just started happening to me yesterday on alot of my tests. Specifically, I'm testing that clicking a specific button will direct the user to a paypal login. On every test that does that, it crashes out after loading the paypal page with:

Error [ERR_TLS_REQUIRED_SERVER_NAME] [ERR_TLS_REQUIRED_SERVER_NAME]: "servername" is required parameter for Server.addContext

[porkus1990]

This just started happening to me yesterday on alot of my tests. Specifically, I'm testing that clicking a specific button will direct the user to a paypal login. On every test that does that, it crashes out after loading the paypal page with:

Error [ERR_TLS_REQUIRED_SERVER_NAME] [ERR_TLS_REQUIRED_SERVER_NAME]: "servername" is required parameter for Server.addContext

Same for me - checked it again: happens only for PayPal requests with cypress.

[giyeonkwon]

Same here. It happens only after PayPal requests with cypress.
Also, my cypress runner fails to connect to the browsers after this issue occurs in my local env.

[alxndr]

This error occurred for hours yesterday on CircleCI, then resolved itself; it has started occurring again today. This is a detailed test suite (>30 test files) for a work project, a React-based CMS which talks to a couple of different back-ends using CORS requests. Many of the tests pass, then this error occurs about halfway through the test suite, at a specific test which does not appear to be doing anything unusual in the setup or assertions.

versions...

• Cypress: 8.3.1 and also 8.6.0
• Node: 14.17.3
• npm: 7.20.6
• Cypress Orb for CircleCI... cypress/base:12.19.0
• Ubuntu 18.04.5 LTS
• Browser: Electron 91 (headless)

Locally I can run the test which fails on CircleCI and it passes, however my local setup is using Electron 93 (headless), so perhaps the browser version is the issue?