From 44c5e5d9b1ece0159e1d85258a93c13d281cf51f Mon Sep 17 00:00:00 2001
From: Ulysses Souza <ulyssessouza@gmail.com>
Date: Tue, 5 Oct 2021 09:16:44 +0200
Subject: [PATCH] Fix index out of range on compose.buildContainerMountOptions

Signed-off-by: Ulysses Souza <ulyssessouza@gmail.com>
---
 pkg/compose/create.go      | 25 ++++++++--------
 pkg/compose/create_test.go | 58 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 67 insertions(+), 16 deletions(-)

diff --git a/pkg/compose/create.go b/pkg/compose/create.go
index 7fecf52738b..08b6b76aac2 100644
--- a/pkg/compose/create.go
+++ b/pkg/compose/create.go
@@ -750,24 +750,21 @@ func buildContainerMountOptions(p types.Project, s types.ServiceConfig, img moby
 					}
 				}
 			}
-			for i, v := range s.Volumes {
-				if v.Target != m.Destination {
+			volumes := []types.ServiceVolumeConfig{}
+			for _, v := range s.Volumes {
+				if v.Target != m.Destination || v.Source != "" {
+					volumes = append(volumes, v)
 					continue
 				}
-				if v.Source == "" {
-					// inherit previous container's anonymous volume
-					mounts[m.Destination] = mount.Mount{
-						Type:     m.Type,
-						Source:   src,
-						Target:   m.Destination,
-						ReadOnly: !m.RW,
-					}
-					// Avoid mount to be later re-defined
-					l := len(s.Volumes) - 1
-					s.Volumes[i] = s.Volumes[l]
-					s.Volumes = s.Volumes[:l]
+				// inherit previous container's anonymous volume
+				mounts[m.Destination] = mount.Mount{
+					Type:     m.Type,
+					Source:   src,
+					Target:   m.Destination,
+					ReadOnly: !m.RW,
 				}
 			}
+			s.Volumes = volumes
 		}
 	}
 
diff --git a/pkg/compose/create_test.go b/pkg/compose/create_test.go
index ecca0ab43c7..22fb1efe26f 100644
--- a/pkg/compose/create_test.go
+++ b/pkg/compose/create_test.go
@@ -21,10 +21,10 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/docker/compose/v2/pkg/api"
-
 	"github.com/compose-spec/compose-go/types"
 	composetypes "github.com/compose-spec/compose-go/types"
+	"github.com/docker/compose/v2/pkg/api"
+	moby "github.com/docker/docker/api/types"
 	mountTypes "github.com/docker/docker/api/types/mount"
 	"gotest.tools/v3/assert"
 )
@@ -81,3 +81,57 @@ func TestPrepareNetworkLabels(t *testing.T) {
 		"com.docker.compose.version": api.ComposeVersion,
 	}))
 }
+
+func TestBuildContainerMountOptions(t *testing.T) {
+	project := composetypes.Project{
+		Name: "myProject",
+		Services: []composetypes.ServiceConfig{
+			{
+				Name: "myService",
+				Volumes: []composetypes.ServiceVolumeConfig{
+					{
+						Type:   composetypes.VolumeTypeVolume,
+						Target: "/var/myvolume1",
+					},
+					{
+						Type:   composetypes.VolumeTypeVolume,
+						Target: "/var/myvolume2",
+					},
+				},
+			},
+		},
+		Volumes: composetypes.Volumes(map[string]composetypes.VolumeConfig{
+			"myVolume1": {
+				Name: "myProject_myVolume1",
+			},
+			"myVolume2": {
+				Name: "myProject_myVolume2",
+			},
+		}),
+	}
+
+	inherit := &moby.Container{
+		Mounts: []moby.MountPoint{
+			{
+				Type:        composetypes.VolumeTypeVolume,
+				Destination: "/var/myvolume1",
+			},
+			{
+				Type:        composetypes.VolumeTypeVolume,
+				Destination: "/var/myvolume2",
+			},
+		},
+	}
+
+	mounts, err := buildContainerMountOptions(project, project.Services[0], moby.ImageInspect{}, inherit)
+	assert.NilError(t, err)
+	assert.Assert(t, len(mounts) == 2)
+	assert.Assert(t, mounts[0].Target == "/var/myvolume1")
+	assert.Assert(t, mounts[1].Target == "/var/myvolume2")
+
+	mounts, err = buildContainerMountOptions(project, project.Services[0], moby.ImageInspect{}, inherit)
+	assert.NilError(t, err)
+	assert.Assert(t, len(mounts) == 2)
+	assert.Assert(t, mounts[0].Target == "/var/myvolume1")
+	assert.Assert(t, mounts[1].Target == "/var/myvolume2")
+}