zeroshade commented on code in PR #13381:
URL: https://github.com/apache/arrow/pull/13381#discussion_r897274054
##########
go/arrow/array/string.go:
##########
@@ -113,6 +113,12 @@ func (a *String) setData(data *Data) {
if offsets := data.buffers[1]; offsets != nil {
a.offsets = arrow.Int32Traits.CastFromBytes(offsets.Bytes())
}
+
+ expNumOffsets := a.array.data.offset + a.array.data.length + 1
+ if a.array.data.length > 0 &&
+ (len(a.offsets) < expNumOffsets ||
int(a.offsets[expNumOffsets-2]) > len(a.values)) {
+ panic("arrow/array: string offsets out of bounds of data
buffer")
+ }
Review Comment:
is the `a.array.data.length > 0` actually needed? Also, shouldn't this be
`len(a.offsets) >= expNumOffsets` ?
`a.offsets[expNumOffsets-2]` would be incorrect, why the -2?
`a.offsets[expNumOffset]` should be the final byte.
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