A DiffLinesToChars then DiffMain bug

[fanan]

Here is the code:

package main

import (
    "github.com/sergi/go-diff/diff"
    "log"
)

func main() {
    sOld := "1\n2\n3\n4\n5\n6\n7\n3\n8\n9\n3\n10\n3\n11\n3\n12\n13\n14\n15\n12\n13\n16\n13\n13\n17\n18\n19\n20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n30\n31\n32\n33\n34\n35\n12\n36\n37\n38\n39\n40\n41\n42\n13\n43\n44\n13\n45\n46\n47\n13\n13\n48\n49\n50\n51\n52\n13\n53\n54\n55\n56\n57\n58\n59\n60\n61\n62\n63\n64\n65\n66\n67\n68\n69\n13\n70\n71\n72\n73\n74\n13\n75\n13\n76\n77\n78\n79\n80\n81\n82\n83\n84\n85\n86\n87\n88\n89\n90\n67\n91\n92\n93\n81\n68\n13\n94\n71\n95\n96\n97\n98\n99\n100\n101\n102\n63\n103\n67\n104\n105\n13\n106\n107\n108\n109\n110\n111\n112\n113\n114\n115\n90\n116\n67\n13\n117\n72\n73\n74\n13\n75\n13\n76\n118\n119\n120\n78\n68\n121\n13\n122\n123\n124\n125\n93\n126\n68\n127\n13\n128\n129\n130\n131\n132\n133\n134\n135\n13\n136\n137\n138\n13\n78\n68\n13\n139\n140\n141\n142\n68\n13\n143\n144\n145\n146\n13\n147\n148\n13\n149\n150\n151\n152\n153\n150\n154\n13\n155\n156\n"
    sNew := "1\n2\n3\n4\n5\n6\n7\n3\n157\n9\n3\n10\n3\n11\n3\n12\n13\n14\n15\n12\n13\n16\n13\n13\n17\n18\n19\n20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n30\n31\n32\n33\n34\n35\n12\n36\n37\n38\n39\n40\n41\n42\n13\n158\n159\n13\n45\n46\n47\n13\n13\n48\n49\n50\n51\n13\n53\n54\n55\n56\n57\n160\n59\n60\n61\n62\n63\n64\n161\n66\n67\n68\n69\n13\n70\n71\n72\n73\n74\n13\n75\n13\n162\n77\n78\n79\n80\n81\n82\n83\n84\n85\n86\n88\n89\n90\n67\n91\n92\n93\n81\n68\n13\n94\n71\n95\n96\n97\n98\n99\n100\n101\n102\n63\n103\n67\n104\n105\n13\n106\n107\n108\n109\n110\n111\n112\n113\n114\n115\n90\n116\n67\n13\n117\n72\n73\n74\n13\n75\n13\n163\n119\n120\n78\n68\n121\n13\n122\n123\n124\n125\n93\n126\n68\n127\n13\n128\n164\n130\n131\n132\n133\n134\n135\n13\n136\n137\n138\n13\n78\n68\n13\n139\n140\n165\n68\n13\n143\n144\n145\n146\n13\n147\n148\n13\n149\n150\n151\n166\n153\n150\n154\n13\n155\n156\n"
    dmp := diffmatchpatch.New()
    t1, t2, t := dmp.DiffLinesToChars(sOld, sNew)
    diffs := dmp.DiffMain(t1, t2, false)
    diffs = dmp.DiffCharsToLines(diffs, t)
    for _, diff := range diffs {
        log.Println(diff.Type, diff.Text)
    }
}

DiffLinesToChars seems to work OK, however, it panics "index out of range" at runtime.

I want to diff two texts line by line, just the line level, not word or char.

Is this a bug or I used the library incorrectly?

Thanks

[sergi]

This should be fixed by #7