What causes "buffer underflow" in go-delve/delve?

ErrBufferUnderflow

ErrBufferUnderflow

Error message

buffer underflow

What it means

Error "buffer underflow" thrown in go-delve/delve.

Source

Thrown at pkg/dwarf/line/parse_util.go:44

	_DW_FORM_string     = 0x08
	_DW_FORM_strp       = 0x0e
	_DW_FORM_strx       = 0x1a
	_DW_FORM_strx1      = 0x25
	_DW_FORM_strx2      = 0x26
	_DW_FORM_strx3      = 0x27
	_DW_FORM_strx4      = 0x28
	_DW_FORM_udata      = 0x0f
)

const (
	_DW_LNCT_path = 0x1 + iota
	_DW_LNCT_directory_index
	_DW_LNCT_timestamp
	_DW_LNCT_size
	_DW_LNCT_MD5
)

var ErrBufferUnderflow = errors.New("buffer underflow")

type formReader struct {
	logf         func(string, ...any)
	contentTypes []uint64
	formCodes    []uint64

	contentType uint64
	formCode    uint64

	block []byte
	u64   uint64
	i64   int64
	str   string
	err   error

	nexti int
}

View on GitHub (pinned to a23773e6c3)

When it happens

Trigger: Thrown at pkg/dwarf/line/parse_util.go:44 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-delve/delve@a23773e6c3 (2026-08-31). Data as JSON: /api/errors/f5d2795a7c189509. Report an issue: GitHub.