pola-rs/r-polars

Tests sometimes fail with `This external pointer is already consumed or deleted` error from `<Series>$to_r_vector()` from `compare_proxy.polars_series`

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#1,411 opened on Jul 17, 2025

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bughelp wanted

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Description

Like:

Error in `x$to_r_vector(ensure_vector = FALSE, int64 = "character", decimal = "character")`: Evaluation failed in `$to_r_vector()`.
Caused by error:
! This external pointer is already consumed or deleted

See eitsupi/neo-r-polars#220 for details.

Contributor guide

Research direction
Reproduce the failing test and trace the error to the `to r vector` function. Check if the external pointer is being consumed prematurely, possibly due to a reference counting issue in the Rust Polars binding.
Tech stack
rrust
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
R
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50