From 7a41ccf44ca7a602e126937a4d6247a6d690a5aa Mon Sep 17 00:00:00 2001
From: Yann Bertrand <5855339+yannbertrand@users.noreply.github.com>
Date: Mon, 18 Nov 2019 21:54:20 +0100
Subject: [PATCH] fix: invalid version error when modules not installed

---
 packages/@vue/cli/lib/Upgrader.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/@vue/cli/lib/Upgrader.js b/packages/@vue/cli/lib/Upgrader.js
index dfa14afc80..31ce20bec0 100644
--- a/packages/@vue/cli/lib/Upgrader.js
+++ b/packages/@vue/cli/lib/Upgrader.js
@@ -201,6 +201,10 @@ module.exports = class Upgrader {
         const installed = await this.pm.getInstalledVersion(name)
         const wanted = await this.pm.getRemoteVersion(name, range)
 
+        if (installed === 'N/A') {
+          throw new Error('At least one dependency is not installed. Please run npm install or yarn before trying to upgrade')
+        }
+
         let latest = await this.pm.getRemoteVersion(name)
         if (includeNext) {
           const next = await this.pm.getRemoteVersion(name, 'next')