invalid memory address or nil pointer dereference for Cell

[sarithaN]

Hi,
I am new to Go and gopdf.
When I am trying to create pdf just to print the "Hi! This is normal.", using below code.

    pdf := gopdf.GoPdf{}
pdf.Start(gopdf.Config{PageSize: *gopdf.PageSizeA4})
pdf.AddPage()
    pdf.Cell(nil, "Hi! This is normal.")
pdf.Br(20)
pdf.Cell(nil, "Hi! This is italic.")
pdf.WritePdf("italic.pdf")

I am getting below exception.
[neerus@data-domain-dev-vm main]$ go run main.go
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x1e8 pc=0x4c4ae3]

goroutine 1 [running]:
github.com/signintech/gopdf.(*SubsetFontObj).AddChars(0x0, {0x4f8b39, 0x12})
../go/pkg/mod/github.com/signintech/gopdf@v0.16.1/subset_font_obj.go:139 +0xc3
github.com/signintech/gopdf.(*GoPdf).Cell(0xc000152000, 0x0?, {0x4f8b39, 0x12})
../go/pkg/mod/github.com/signintech/gopdf@v0.16.1/gopdf.go:1077 +0xb3
main.main()
../main/main.go:62 +0xb6

Please help me in How can I address this error

[Wanpat Anantapan]

I guess because you haven't set the font yet.

pdf := gopdf.GoPdf{}
pdf.Start(gopdf.Config{PageSize: *gopdf.PageSizeA4})

//add ttf file and set font 
pdf.AddTTFFont("some", "some.ttf")
pdf.SetFont("some", "", 14)

pdf.AddPage()
pdf.Cell(nil, "Hi! This is normal.")
pdf.Br(20)
pdf.Cell(nil, "Hi! This is italic.")
pdf.WritePdf("italic.pdf")

[sarithaN]

Thanks it worked now

[DravenK]

same issue. why not set the default TTF file? I did not found any document talk I must set the font value.