comphead commented on code in PR #14863:
URL: https://github.com/apache/datafusion/pull/14863#discussion_r1970074102
##########
datafusion/expr/src/logical_plan/plan.rs:
##########
@@ -2869,7 +2869,11 @@ fn intersect_maps<'a>(
let mut inputs = inputs.into_iter();
let mut merged: HashMap<String, String> =
inputs.next().cloned().unwrap_or_default();
for input in inputs {
- merged.retain(|k, v| input.get(k) == Some(v));
+ // The extra dereference below (`&*v`) is a workaround for
https://github.com/rkyv/rkyv/issues/434.
+ // When this crate is used in a workspace that enables the `rkyv-64`
feature in the `chrono` crate,
+ // this triggers a Rust compilation error:
+ // error[E0277]: can't compare `Option<&std::string::String>` with
`Option<&mut std::string::String>`.
Review Comment:
is it compiler dependent? I was not able to reproduce either on latest
compiler
UPD: i was able to reproduce it when enable feature in `Cargo.toml`
```
chrono = { version = "0.4.38", default-features = false, features =
["rkyv-64"] }
```
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