html/template: runtime error: slice bounds out of range (2)

[dvyukov]

The following program crashes with panic:

package main

import (
    "html/template"
    "io/ioutil"
)

func main() {
    t, err := template.New("foo").Parse(string(data))
    if err != nil {
        return
    }
    t.Execute(ioutil.Discard, nil)
}

var data = "<style>\xbbߤ2Dq\x8e%5\xf1\x945\xf1\x94</style>"

panic: runtime error: slice bounds out of range

goroutine 1 [running]:
html/template.(*escaper).escapeText(0xc208010540, 0x2000000000f, 0x0, 0xc208014810, 0x0, 0x0)
    src/html/template/escape.go:596 +0xceb
html/template.(*escaper).escape(0xc208010540, 0x0, 0x0, 0x7fe7fb498378, 0xc208014810, 0x700000000000000, 0x0)
    src/html/template/escape.go:129 +0x31a
html/template.(*escaper).escapeList(0xc208010540, 0x0, 0x0, 0xc2080147e0, 0x0, 0x0)
    src/html/template/escape.go:440 +0x1c9
html/template.(*escaper).escapeListConditionally(0xc208010500, 0x0, 0x0, 0xc2080147e0, 0xc2080419b0, 0x0, 0x0, 0x7fe7fb644000)
    src/html/template/escape.go:455 +0x4be
html/template.(*escaper).escapeTemplateBody(0xc208010500, 0x0, 0x0, 0xc208010440, 0x0, 0x0, 0xc20000000000001d)
    src/html/template/escape.go:573 +0x1e2
html/template.(*escaper).computeOutCtx(0xc208010500, 0x0, 0x0, 0xc208010440, 0x0, 0x0)
    src/html/template/escape.go:534 +0xc9
html/template.(*escaper).escapeTree(0xc208010500, 0x0, 0x0, 0x7fe7fb4983c0, 0xc2080147e0, 0x5ba240, 0x3, 0x0, 0x0, 0x0, ...)
    src/html/template/escape.go:527 +0x77f
html/template.escapeTemplate(0xc2080146f0, 0x7fe7fb4983c0, 0xc2080147e0, 0x5ba240, 0x3, 0x0, 0x0)
    src/html/template/escape.go:23 +0x334
html/template.(*Template).escape(0xc2080146f0, 0x0, 0x0)
    src/html/template/template.go:85 +0x35d
html/template.(*Template).Execute(0xc2080146f0, 0x7fe7fb498350, 0xc20800a4c0, 0x0, 0x0, 0x0, 0x0)
    src/html/template/template.go:101 +0x37
main.main()
    /tmp/htmltempl.go:13 +0x290

on commit ccc76db

[dspezia]

See my explanation in #10612
This problem is fixed on tip; this issue can be closed.

[dvyukov]

Test before closing please.

[robpike]

Fixed at tip (tested).