Merge branch 'master' into master

diffmatchpatch/diff.go

diff --git a/diffmatchpatch/diff.go b/diffmatchpatch/diff.go
index 25cc51f..17ad990 100644
--- a/diffmatchpatch/diff.go
+++ b/diffmatchpatch/diff.go
@@ -1310,17 +1310,17 @@
 	// '\x00' is a valid character, but various debuggers don't like it. So we'll insert a junk entry to avoid generating a null character.
 	lineArray := []string{""} // e.g. lineArray[4] == 'Hello\n'
 
+	lineHash := make(map[string]int)
 	//Each string has the index of lineArray which it points to
-	strIndexArray1 := dmp.diffLinesToStringsMunge(text1, &lineArray)
-	strIndexArray2 := dmp.diffLinesToStringsMunge(text2, &lineArray)
+	strIndexArray1 := dmp.diffLinesToStringsMunge(text1, &lineArray, lineHash)
+	strIndexArray2 := dmp.diffLinesToStringsMunge(text2, &lineArray, lineHash)
 
 	return strIndexArray1, strIndexArray2, lineArray
 }
 
 // diffLinesToStringsMunge splits a text into an array of strings, and reduces the texts to a []string.
-func (dmp *DiffMatchPatch) diffLinesToStringsMunge(text string, lineArray *[]string) []index {
+func (dmp *DiffMatchPatch) diffLinesToStringsMunge(text string, lineArray *[]string, lineHash map[string]int) []uint32 {
 	// Walk the text, pulling out a substring for each line. text.split('\n') would would temporarily double our memory footprint. Modifying text would create many large strings to garbage collect.
-	lineHash := map[string]int{} // e.g. lineHash['Hello\n'] == 4
 	lineStart := 0
 	lineEnd := -1
 	strs := []index{}

diffmatchpatch/diff_test.go

diff --git a/diffmatchpatch/diff_test.go b/diffmatchpatch/diff_test.go
index 7955b1f..d1611da 100644
--- a/diffmatchpatch/diff_test.go
+++ b/diffmatchpatch/diff_test.go
@@ -317,7 +317,9 @@
 		{"", "alpha\r\nbeta\r\n\r\n\r\n", "", "\x01\x02\x03\x03", []string{"", "alpha\r\n", "beta\r\n", "\r\n"}},
 		{"a", "b", "\x01", "\x02", []string{"", "a", "b"}},
 		// Omit final newline.
-		{"alpha\nbeta\nalpha", "", "\x01\x02\x03", "", []string{"", "alpha\n", "beta\n", "alpha"}},
+		{"alpha\nbeta\nalpha", "", "1,2,3", "", []string{"", "alpha\n", "beta\n", "alpha"}},
+		// Same lines in Text1 and Text2
+		{"abc\ndefg\n12345\n", "abc\ndef\n12345\n678", "1,2,3", "1,4,3,5", []string{"", "abc\n", "defg\n", "12345\n", "def\n", "678"}},
 	} {
 		actualChars1, actualChars2, actualLines := dmp.DiffLinesToChars(tc.Text1, tc.Text2)
 		assert.Equal(t, tc.ExpectedChars1, actualChars1, fmt.Sprintf("Test case #%d, %#v", i, tc))

go.mod

diff --git a/go.mod b/go.mod
index d46c77d..c731033 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/stretchr/testify v1.4.0
 	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
-	gopkg.in/yaml.v2 v2.2.4 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 go 1.12

go.sum

diff --git a/go.sum b/go.sum
index 4b80e08..8dd9f36 100644
--- a/go.sum
+++ b/go.sum
@@ -19,3 +19,5 @@
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=