TypeError: Cannot read property 'toString' of null

[leavenotrace]

zanui-weapp git:(dev) ✗ npm audit fix
npm WARN deprecated istanbul-lib-hook@1.2.1: 1.2.0 should have been a major version bump
npm WARN deprecated socks@1.1.10: If using 2.x branch, please upgrade to at least 2.1.6 to avoid a serious bug with socket data flow and an import issue introduced in 2.1.0
npm WARN eslint-config-airbnb@16.1.0 requires a peer of eslint-plugin-react@^7.4.0 but none is installed. You must install peer dependencies yourself.

• wedoc@0.0.17
• gh-pages@1.2.0
  added 9 packages from 4 contributors, removed 1 package and updated 4 packages in 13.47s
  fixed 85 of 95 vulnerabilities in 38509 scanned packages
  1 package update for 10 vulns involved breaking changes
  (use npm audit fix --force to install breaking changes; or do it by hand)
  ➜ zanui-weapp git:(dev) ✗ npm run dev

zanui-weapp@3.0.4 dev /Users/bobzheng/Documents/Code/wechat/zanui-weapp
node scripts/build-dev.js --color

[10:51:11] Working directory changed to ~/Documents/Code/wechat/zanui-weapp/scripts/utils
gulp[1455]: ../src/node_contextify.cc:629:static void node::contextify::ContextifyScript::New(const FunctionCallbackInfov8::Value &): Assertion `args[1]->IsString()' failed.
1: node::Abort() [/usr/local/bin/node]
2: node::MakeCallback(v8::Isolate*, v8::Localv8::Object, char const*, int, v8::Localv8::Value, node::async_context) [/usr/local/bin/node]
3: node::contextify::ContextifyScript::New(v8::FunctionCallbackInfov8::Value const&) [/usr/local/bin/node]
4: v8::internal::FunctionCallbackArguments::Call(v8::internal::CallHandlerInfo) [/usr/local/bin/node]
5: v8::internal::MaybeHandlev8::internal::Object v8::internal::(anonymous namespace)::HandleApiCallHelper(v8::internal::Isolate*, v8::internal::Handlev8::internal::HeapObject, v8::internal::Handlev8::internal::HeapObject, v8::internal::Handlev8::internal::FunctionTemplateInfo, v8::internal::Handlev8::internal::Object, v8::internal::BuiltinArguments) [/usr/local/bin/node]
6: v8::internal::Builtin_Impl_HandleApiCall(v8::internal::BuiltinArguments, v8::internal::Isolate*) [/usr/local/bin/node]
7: 0x8399028427d
/private/var/folders/58/cgcfbhz10xs2gw8zqp8jzzfr0000gn/T/shelljs_461429abe41eff121c34:10
fs.writeFileSync(fname, err.code.toString());
^

TypeError: Cannot read property 'toString' of null
at /private/var/folders/58/cgcfbhz10xs2gw8zqp8jzzfr0000gn/T/shelljs_461429abe41eff121c34:10:38
at ChildProcess.exithandler (child_process.js:298:5)
at ChildProcess.emit (events.js:182:13)
at maybeClose (internal/child_process.js:961:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:248:5)
exec: internal error

[rex-zsd]

@leavenotrace
node v10.0.0 is buggy with gulp v3.9, downgrade node to v9.0.0 could resolve this.
#20285