gvol opened a new issue, #47417:
URL: https://github.com/apache/arrow/issues/47417
### Describe the bug, including details regarding any error messages,
version, and platform.
When I build (in debug) and run the code below I get the following assertion
firing:
```
$ ./arrow_json
/Users/iandrus/.conan2/p/b/arrow4b55108a32d91/b/src/cpp/src/arrow/json/parser.cc:540:
Check failed: (builder) == (parent.kind == Kind::kArray ?
Cast<Kind::kArray>(parent)->value_builder() :
Cast<Kind::kObject>(parent)->field_builder(field_index))
Abort trap: 6 ./arrow_json
```
Needless to say, it shouldn't abort on this, but rather fail to parse (if
it's not valid—though it seems to me that it should be valid).
```
#include <arrow/buffer.h>
#include <arrow/io/api.h>
#include <arrow/json/api.h>
#include <arrow/status.h>
#include <memory>
#include <string>
int main( void ) {
std::string json_data = R"json({
"all_nulls": [null, null, null]
})json";
auto buffer = std::make_shared<::arrow::Buffer>(
reinterpret_cast<uint8_t const *>( json_data.data() ),
json_data.size() );
auto input = std::make_shared<::arrow::io::BufferReader>( buffer );
auto reader = ::arrow::json::TableReader::Make(
::arrow::default_memory_pool(),
input,
::arrow::json::ReadOptions::Defaults(),
::arrow::json::ParseOptions::Defaults() );
if ( !reader.ok() ) {
return 1;
}
auto result = (*reader)->Read();
return result.ok() ? 0 : 1;
}
// clang++ -o ./arrow_json ./arrow_json_main.cpp -isystem
/Users/iandrus/.conan2/p/b/arrow4b55108a32d91/p/include -std=c++20 -L
/Users/iandrus/.conan2/p/b/arrow4b55108a32d91/p/lib/ -larrow
-larrow_bundled_dependencies -L
/Users/iandrus/.conan2/p/b/snapp07bbfca910b63/p/lib/ -lsnappy -L
/Users/iandrus/.conan2/p/b/zstde2aeb565ce8ea/p/lib -lzstd
-L/Users/iandrus/.conan2/p/b/zlibb749ff5e66dc6/p/lib -lz
```
Changing the json to have `[null, "hi", null]` gives a different assertion.
After some experimenting, the trouble seems to be the null in the first
position.
```
/Users/iandrus/.conan2/p/b/arrow4b55108a32d91/b/src/cpp/src/arrow/json/parser.cc:1151:
Check failed: (list_builder->value_builder()) == (builder_)
Abort trap: 6 ./arrow_json
```
### Component(s)
C++
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