From 14b1afa3d0a84aced5b07855d3bf7620e13e0701 Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Mon, 8 Oct 2018 21:49:20 -0700
Subject: [PATCH] solver: fix possible nil dereference

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 solver/index.go | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/solver/index.go b/solver/index.go
index 1bb17d89..78a2cca2 100644
--- a/solver/index.go
+++ b/solver/index.go
@@ -211,10 +211,12 @@ func (ei *edgeIndex) getAllMatches(k *CacheKey) []string {
 			for _, d := range dd {
 				ll := CacheInfoLink{Input: Index(i), Digest: k.Digest(), Output: k.Output(), Selector: d.Selector}
 				for _, ckID := range d.CacheKey.CacheKey.indexIDs {
-					if l, ok := ei.items[ckID].links[ll]; ok {
-						if _, ok := l[m]; ok {
-							found = true
-							break
+					if item, ok := ei.items[ckID]; ok {
+						if l, ok := item.links[ll]; ok {
+							if _, ok := l[m]; ok {
+								found = true
+								break
+							}
 						}
 					}
 				}