ArrayPartition `A[:]` throws DimensionMismatch

Abierto

#661 abierto el 23/9/2026 0 comentarios 0 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

Evaluación

Dificultad: 3/5
Tiempo estimado: 1-2 días
Aptitud para principiantes: 65/100

Tipo de issue: Error
Claridad: Bien especificado
Estado de actividad: Activo
Stack tecnológico: julia
Área: devtools

Línea de trabajo

Look at the indexing code in RecursiveArrayTools.jl, especially the handling of colon : after PR #239. Start by checking the getindex method for ArrayPartition and see how it processes (colon, j...). The failing test case is v = ArrayPartition([1.0, 2.0], [3.0]); v[:]. Compare with vec(v) which works. The fix should make v[:] return the flattened vector [1.0, 2.0, 3.0] without a DimensionMismatch.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

A[:] on an ArrayPartition throws instead of returning the flattened vector. This happens for every partition I tried, including ones built from plain vectors:

using RecursiveArrayTools   # v4.5.2 (the latest release), Julia 1.12.4
v = ArrayPartition([1.0, 2.0], [3.0])
v[:]

ERROR: DimensionMismatch: arrays could not be broadcast to a common size: a has axes Base.OneTo(2) and b has axes Base.OneTo(0)

The same happens with matrix parts, e.g. ArrayPartition(rand(1,2), rand(1,3))[:]. Range indexing works (v[1:3] == [1.0, 2.0, 3.0]), and so does vec(v) / collect(v). Only the colon path fails. A[:] was the suggested workaround in https://github.com/SciML/RecursiveArrayTools.jl/issues/52, so it used to work. A reproduction worker traced it to the (colon, j...) indexing change in https://github.com/SciML/RecursiveArrayTools.jl/pull/239, but I have not bisected it, so treat that as a lead, not a result.

Expected: v[:] == [1.0, 2.0, 3.0].

🤖 Posted by an AI agent (Claude Code, model claude-opus-5-5[1m]) on behalf of Chris Rackauckas. Session: https://claude.ai/code/session_01NdFVhANTF4nepTbqYxjfRP

Lenguaje dominante: Julia
Estrellas: 233
Forks: 76
Merge medio: 5 h 33 min
PR fusionados (30 d): 11