alamb opened a new issue, #7701:
URL: https://github.com/apache/arrow-rs/issues/7701
**Describe the bug**
The `VariantBuilder` code will panic if you try and append an existing
Object or LIst
**To Reproduce**
Add this test to `parquet-variant/src/builder.rs`"
```rust
#[test]
fn test_append_object() {
let (object_metadata, object_value) = {
let mut builder = VariantBuilder::new();
let mut obj = builder.new_object();
obj.append_value("name", "John");
obj.finish();
builder.finish()
};
let object_variant = Variant::try_new(&object_metadata,
&object_value).unwrap();
let mut builder = VariantBuilder::new();
builder.append_value(object_variant.clone());
let (metadata, value) = builder.finish();
let variant = Variant::try_new(&metadata, &value).unwrap();
assert_eq!(variant, object_variant);
}
}
```
This results in
```
internal error: entered unreachable code: Object and List variants cannot be
created through Into<Variant>
thread 'builder::tests::test_append_object' panicked at
parquet-variant/src/builder.rs:395:17:
```
**Expected behavior**
I expect the object variant to be copied to the in progress builder
**Additional context**
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Add any other context about the problem here.
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