SIGSEGV or SIGBUS when validating

[AlwxSin]

I've got strange issue when trying to validate large number (more than 100) of large xml files (20-130mb). It looks like this

unexpected fault address 0xc0068c3000
fatal error: fault
[signal SIGBUS: bus error code=0x4 addr=0xc0068c3000 pc=0x55dffd]

or

SIGSEGV: segmentation violation
PC=0x7f19813d22222e3 m=43 sigcode=1
signal arrive during cgo execution

Stacktrace always the same

runtime.cgocall(0x868de0, 0xc000739698)
  /usr/local/go/src/runtime/cgocall.go:157 +0x4b fp=0xc000739670 sp=0xc000739638 pc=0x40a68b
github.com/terminalstatic/go-xsd-validate._C2func_cParseDoc(0x7fe986193010, 0x5e6c74f, 0x1)
  _cgo_gotypes.go:254 +0x57 fp=0xc000739698 sp=0xc000739670 pc=0x538d57
github.com/terminalstatic/go-xsd-validate.parseXmlMem.func3(0x7fe986193010?, {0xc020aa0000?, 0x5e6c74f, 0x757e000?}, 0x1?)
  /builds/app/.go/pkg/mod/github.com/terminalstatic/[email protected]/libxml2.go:433 +0x5a fp=0xc0007396e8 sp=0xc000739698 pc=0x5397fa
github.com/terminalstatic/go-xsd-validate.parseXmlMem({0xc020aa0000, 0x5e6c74f, 0x757e000}, 0xfe?)
  /builds/app/.go/pkg/mod/github.com/terminalstatic/[email protected]/libxml2.go:433 +0xa5 fp=0xc000739780 sp=0xc0007396e8 pc=0x5395e5
github.com/terminalstatic/go-xsd-validate.NewXmlHandlerMem({0xc020aa0000?, 0xc00f542010?, 0x0?}, 0x1d?)
  /builds/app/.go/pkg/mod/github.com/terminalstatic/[email protected]/validate_xsd.go:94 +0x29 fp=0xc0007397d8 sp=0xc000739780 pc=0x53a3e9

Problem is that I can't reproduce it on my machine with same files and I don't have access to server, where error occurs.

Error can happen at any time, on any file, can't reproduce it on exact one file or set of files. Only on bunch of xml's. Error can happen at second file or at 29th, no pattern.

How can I debug or reproduce error? Maybe there is a bug C code?