builder: fix cancellation context issue

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com> Upstream-commit: 2567dd9afc070428082aa1bec14ee037337dd5c4 Component: engine
2018-05-24 19:37:11 -07:00
parent b29ae02ee8
commit 8a84262fd3
1 changed files with 2 additions and 1 deletions
--- a/components/engine/builder/builder-next/builder.go
+++ b/components/engine/builder/builder-next/builder.go
@ -137,7 +137,8 @@ func (b *Builder) Build(ctx context.Context, opt backend.BuildConfig) (*builder.
 			b.jobs[buildID] = newBuildJob()
 		}
 		j := b.jobs[buildID]
-		ctx, cancel := context.WithCancel(ctx)
+		var cancel func()
+		ctx, cancel = context.WithCancel(ctx)
 		j.cancel = cancel
 		b.mu.Unlock()