Many packages asserts with: Assertion oldentry->max_world == ~(size_t)0 && "method cannot be added at the same time as method deleted"' failed.

[KristofferC]

Many packages now assert with something similar to:

WARNING: Method definition constructorof(Type{var"#s1"} where var"#s1"<:(IntervalSets.Interval{L, R, T} where T)) where {L, R} in module ConstructionBaseIntervalSetsExt at /home/pkgeval/.julia/packages/ConstructionBase/pAlst/ext/ConstructionBaseIntervalSetsExt.jl:6 overwritten in module ConstructionBaseExtras at /home/pkgeval/.julia/packages/ConstructionBaseExtras/cy4E1/src/intervalsets.jl:3.
julia: /source/src/gf.c:1486: get_intersect_visitor: Assertion `oldentry->max_world == ~(size_t)0 && "method cannot be added at the same time as method deleted"' failed.

Example PkgEval log: https://s3.amazonaws.com/julialang-reports/nanosoldier/pkgeval/by_hash/c9a32f4_vs_e4ee485/ConstructionBaseExtras.primary.log

I think this happens when a method is overwritten but I didn't check all cases.

[maleadt]

MWE, requiring actual packages and extensions, and running with assertions enabled:

ConstructionBase.jl, defining the constructorof method

module ConstructionBase
constructorof() = nothing
end

StaticArrays.jl, an empty package to trigger a package extension

module StaticArrays
end

ConstructionBaseStaticArraysExt.jl, the extension that defines constructorof(::Type{<:Integer}):

module ConstructionBaseStaticArraysExt
using ConstructionBase
ConstructionBase.constructorof(::Type) = nothing
ConstructionBase.constructorof(::Type{<:Integer}) = nothing
end

Finally, main.jl, also defining constructorof(::Type{<:Integer}) and crashing when loading StaticArrays -> ConstructionBaseStaticArraysExt

using ConstructionBase
ConstructionBase.constructorof(::Type{<:Integer}) = nothing
using StaticArrays

[maleadt]

Not fixed; the assertion has now just changed to:

Failed to precompile EasyJobsBase [db8ca866-b61f-4bd1-a9b9-75c107d645d4] to "/home/pkgeval/.julia/compiled/v1.11/EasyJobsBase/jl_mX2s9D".
julia: /source/src/gf.c:1486: get_intersect_visitor: Assertion `oldentry->max_world != closure->newentry->min_world && "method cannot be added at the same time as method deleted"' failed.

e.g. https://s3.amazonaws.com/julialang-reports/nanosoldier/pkgeval/by_date/2023-07/14/SimpleWorkflows.primary.log

It also looks like more package trigger the new form of that assertion now?

[vtjnash]

The Pkg.precompile code now intentionally suppresses a lot of essential information, which seems to be a severe regression to me, but the PR to fix it is sitting idle (JuliaLang/Pkg.jl#3536). Running this manually results in:

  1 dependency had warnings during precompilation:
┌ Thinkers [6d80a3f9-a943-41fa-97b3-3004c0daf7a3]
│  WARNING: Method definition (::Type{Thinkers.TimeLimitedThunk})(Any, Any) in module Thinkers at /home/vtjnash/.julia/packages/Thinkers/AFzBt/src/TimeLimitedThunk.jl:9 overwritten at /home/vtjnash/.julia/packages/Thinkers/AFzBt/src/TimeLimitedThunk.jl:15.
│    ** incremental compilation may be fatally broken for this module **
└  

And this is exactly (half of) the reason it prints this error. I can push a fix to make that error more clear though.