gistfile.patch

commit f762c746c0e13d84db68af5b0d4e711aaa5bee74
Author: Romain Marcadier <romain.muller@telecomnancy.net>
Date:   Mon Feb 8 11:28:53 2021 +0100

    fix: TypeError when loading graceful-fs from worker threads
    
    Fixes #204
    
    PR-URL: https://github.com/isaacs/node-graceful-fs/pull/205
    Credit: @RomainMuller
    Close: #205
    Reviewed-by: @coreyfarrell
    
    EDIT(@isaacs): changed chdir from `!= null` to a function `typeof` test,
    in case it's set, but still not a function.
    
    EDIT(@isaacs): added test

diff --git a/polyfills.js b/polyfills.js
index 56d08d1..1287da1 100644
--- a/polyfills.js
+++ b/polyfills.js
@@ -14,12 +14,15 @@ try {
   process.cwd()
 } catch (er) {}
 
-var chdir = process.chdir
-process.chdir = function(d) {
-  cwd = null
-  chdir.call(process, d)
+// This check is needed until node.js 12 is required
+if (typeof process.chdir === 'function') {
+  var chdir = process.chdir
+  process.chdir = function (d) {
+    cwd = null
+    chdir.call(process, d)
+  }
+  if (Object.setPrototypeOf) Object.setPrototypeOf(process.chdir, chdir)
 }
-if (Object.setPrototypeOf) Object.setPrototypeOf(process.chdir, chdir)
 
 module.exports = patch
 
diff --git a/test/do-not-break-if-chdir-is-missing.js b/test/do-not-break-if-chdir-is-missing.js
new file mode 100644
index 0000000..90d2510
--- /dev/null
+++ b/test/do-not-break-if-chdir-is-missing.js
@@ -0,0 +1,4 @@
+process.chdir = 'i am not a function so dont call me maybe'
+const t = require('tap')
+require('../')
+t.equal(process.chdir, 'i am not a function so dont call me maybe')