From 7f57a5355a7b66fba349585f715284671cd6138c Mon Sep 17 00:00:00 2001
From: Kristoffer Carlsson <kricarl@student.chalmers.se>
Date: Wed, 22 Apr 2020 18:20:15 +0200
Subject: [PATCH] dont assume we can find source code for loaded packages
 (#460)

---
 src/pkgs.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/pkgs.jl b/src/pkgs.jl
index 17a2ec87..a187f480 100644
--- a/src/pkgs.jl
+++ b/src/pkgs.jl
@@ -81,6 +81,7 @@ end
 # that's easier to precompile. (This is a hotspot in loading Revise.)
 function filter_valid_cachefiles(sourcepath, paths)
     fpaths = String[]
+    sorcepath === nothing && return fpaths
     for path in paths
         if Base.stale_cachefile(sourcepath, path) !== true
             push!(fpaths, path)