fix(gatsby): fix proxy creation on read-only properties (#31346) (#31364

)

(cherry picked from commit c210f1d)

Co-authored-by: Michal Piechowiak <misiek.piechowiak@gmail.com>

packages/gatsby/cache-dir/ssr-builtin-trackers/__tests__/fs.js

@@ -0,0 +1,7 @@
+const fs = require(`../fs`)
+
+describe(`tracking fs`, () => {
+  it(`doesn't crash on accessing fs.constants`, () => {
+    expect(() => fs.constants).not.toThrow()
+  })
+})

packages/gatsby/cache-dir/ssr-builtin-trackers/tracking-unsafe-module-wrapper.js

@@ -11,6 +11,18 @@ function createProxyHandler(prefix, options) {
         return value
       }
 
+      const fieldDescriptor = Object.getOwnPropertyDescriptor(target, key)
+      if (fieldDescriptor && !fieldDescriptor.writable) {
+        // this is to prevent errors like:
+        // ```
+        // TypeError: 'get' on proxy: property 'constants' is a read - only and
+        // non - configurable data property on the proxy target but the proxy
+        // did not return its actual value
+        // (expected '[object Object]' but got '[object Object]')
+        // ```
+        return value
+      }
+
       if (typeof value === `function`) {
         return function wrapper(...args) {
           const myErrorHolder = {