pdfcpu error example

For use in helping debug pdfcpu/pdfcpu#320

To Run:

go run main.go

System information:

OS: Windows 10 64-bit
Golang: go1.15.2 windows/amd64
pdfcpu: v0.3.11

Task details:

• merge page1.pdf and page2.pdf using api.Merge()
• apply an image watermark to input.pdf using api.AddWatermarks()

Desired Output:

2-page PDF called output.pdf with the text hidden behind a white image watermark on page 1

Success Case:

With Windows Date & Time Settings set to Time Zone (UTC -07:00) Mountain Time (US & Canada), the program functions as expected.

Failure Case:

With Windows Date & Time Setting set to Time Zone (UTC -10:00) Hawaii, the program fails with the following error:

add watermark error: pdfcpu: validateDateObject: <D:20210409072606+-10'00'> invalid date

Stack Trace:

Variables:
o = {github.com/pdfcpu/pdfcpu/pkg/pdfcpu.StringLiteral}(D:20210409073107+-10'00')

github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.validateDateObject at objects.go:183
github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.validateInfoDictDate at info.go:48
github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.validateDocInfoDictEntry at info.go:123
github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.validateDocumentInfoDict at info.go:153
github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.validateDocumentInfoObject at info.go:182
github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate.XRefTable at xReftable.go:46
github.com/pdfcpu/pdfcpu/pkg/api.readAndValidate at api.go:111
github.com/pdfcpu/pdfcpu/pkg/api.readValidateAndOptimize at api.go:121
github.com/pdfcpu/pdfcpu/pkg/api.AddWatermarks at stamp.go:220
main.main at main.go:66
runtime.main at proc.go:204
runtime.goexit at asm_amd64.s:1374
 - Async Stack Trace
runtime.rt0_go at asm_amd64.s:220