panic: runtime error: slice bounds out of range [3:2]
goroutine 76 [running]:
metagrid/domains/provider/hallernet.removeEmpty(0xc00019fdc0, 0x3, 0x4, 0xffffffffffffffff, 0xc00019fdc0, 0x3)
/go/src/source.dodis.ch/metagrid-go/metagid-go/domains/provider/hallernet/hallernet.go:246 +0x1ec
metagrid/domains/provider/hallernet.guessFromLabel(0xc0005aaa10, 0xc, 0xc0000b8180)
/go/src/source.dodis.ch/metagrid-go/metagid-go/domains/provider/hallernet/hallernet.go:212 +0x21c
metagrid/domains/provider/hallernet.(*hallernetCollector).OnResponse(0xc000311720, 0xc000276580, 0xc000310101, 0xfa7cc0, 0xc000098540, 0xc0000ae180)
/go/src/source.dodis.ch/metagrid-go/metagid-go/domains/provider/hallernet/hallernet.go:95 +0x183
metagrid/collect.(*Collect).onResponse(0xc0000f4000, 0xc000276580)
/go/src/source.dodis.ch/metagrid-go/metagid-go/collect/collect.go:155 +0x146
github.com/gocolly/colly/v2.(*Collector).handleOnResponse(0xc0000f6000, 0xc000276580)
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/colly.go:1035 +0x69
github.com/gocolly/colly/v2.(*Collector).fetch(0xc0000f6000, 0xc00022d2c0, 0x122, 0xc0005abe20, 0x3, 0x0, 0xfa11e0, 0xc0003207b0, 0xc0000d4680, 0xc000321410, ...)
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/colly.go:674 +0x46c
github.com/gocolly/colly/v2.(*Collector).scrape(0xc0000f6000, 0xc00022d2c0, 0x122, 0xc0005abe20, 0x3, 0x0, 0xfa11e0, 0xc0003207b0, 0xc0000d4680, 0xc000321410, ...)
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/colly.go:577 +0x47e
github.com/gocolly/colly/v2.(*Request).Do(0xc000671e00, 0xc000677fb8, 0x1)
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/request.go:156 +0x94
github.com/gocolly/colly/v2/queue.independentRunner(0xc0004257a0, 0xc000425800)
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/queue/queue.go:191 +0x3f
created by github.com/gocolly/colly/v2/queue.(*Queue).Run
/go/pkg/mod/github.com/gocolly/colly/v2@v2.1.0/queue/queue.go:135 +0x164