thisisnic commented on code in PR #14062:
URL: https://github.com/apache/arrow/pull/14062#discussion_r964890117
##########
r/src/type_infer.cpp:
##########
@@ -165,8 +165,13 @@ std::shared_ptr<arrow::DataType>
InferArrowTypeFromVector<VECSXP>(SEXP x) {
cpp11::stop(
"Requires at least one element to infer the values' type of a list
vector");
}
-
- ptype = VECTOR_ELT(x, 0);
+ // Iterate through the vector until we get a non-null result
+ for (R_xlen_t i = 0; i < XLENGTH(x); i++) {
+ ptype = VECTOR_ELT(x, i);
+ if (!Rf_isNull(ptype)) {
Review Comment:
I guess we actually want the Null type there...
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