Precompilation fails: LaMEM overwrites ReadVTK.piece(::VTKFile)

[wenrongcao]

Hi Boris and others,

I’m seeing a precompilation failure when importing LaMEM (v0.4.8) although test LaMEM shows all tests passed.

To reproduce this failure: Julia> using LaMEM.

Julia tries to precompile LaMEM and errors with method overwriting during precompilation:

[ Info: Precompiling LaMEM [2e889f3d-35ce-4a77-8ea2-858aecb630f7]
WARNING: Method definition piece(ReadVTK.VTKFile) in module ReadVTK at /Users/wenrongcao/.julia/packages/ReadVTK/cMvIT/src/ReadVTK.jl:186 overwritten in module IO_functions at /Users/wenrongcao/.julia/packages/LaMEM/hssJ1/src/read_timestep.jl:279.
ERROR: Method overwriting is not permitted during Module precompilation. Use `__precompile__(false)` to opt-out of precompilation.
┌ Info: Skipping precompilation due to precompilable error. Importing LaMEM [2e889f3d-35ce-4a77-8ea2-858aecb630f7].
└   exception = Error when precompiling module, potentially caused by a __precompile__(false) declaration in the module.

After this, LaMEM may still import (with “Skipping precompilation…”), but the module is not cached and the warning/error repeats in sessions and can also show up when other packages trigger extension precompilation Julia> using Plots.

It is likely that 'src/read_timestep.jl' defines a method: piece(::ReadVTK.VTKFile) that appears to overwrite an existing method in ReadVTK: piece(::ReadVTK.VTKFile) in ReadVTK.jl:186.

I am using:
Julia Version 1.12.3, macOS (x86_64-apple-darwin24.0.0, GeophysicalModelGenerator v0.7.16, LaMEM v0.4.8, Plots v1.41.4

[boriskaus]

yes this has been around for some time. Would be great if you can make a PR

[wenrongcao]

Sure, I will make a PR.