Error using Libz on Windows, no zlib1 found

[kool7d]

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Expected Behavior

Current Behavior

I am getting an error when trying to using Libz since it is needed for BioStructures.

Possible Solution / Implementation

I copied the zlib1.dll from the bin folder for Julia 1.2 to the bin folder for Julia 1.3 which was missing it and now it appears to be working. Seems to be an issue with changing to Julia 1.3

Steps to Reproduce (for bugs)

1. 2. 3. 4.

Context

Your Environment

• Package Version used:
• Julia Version used:
• Operating System and version (desktop or mobile):
• Link to your project:

[jnoynaert]

Same for me Windows 10 Pro build 1903, with a fresh install of Julia 1.3:

(v1.3) pkg> add Libz
 Resolving package versions...
  Updating `C:\Users\jnoynaert\.julia\environments\v1.3\Project.toml`
  [2ec943e9] + Libz v1.0.0
  Updating `C:\Users\jnoynaert\.julia\environments\v1.3\Manifest.toml`
 [no changes]

julia> using Libz
[ Info: Precompiling Libz [2ec943e9-cfe8-584d-b93d-64dcb6d567b7]
ERROR: LoadError: LoadError: error compiling version: could not load library "zlib1"
The specified module could not be found.

Stacktrace:
 [1] top-level scope at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\lowlevel.jl:110
 [2] include at .\boot.jl:328 [inlined]
 [3] include_relative(::Module, ::String) at .\loading.jl:1105
 [4] include at .\Base.jl:31 [inlined]
 [5] include(::String) at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\Libz.jl:3
 [6] top-level scope at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\Libz.jl:11
 [7] include at .\boot.jl:328 [inlined]
 [8] include_relative(::Module, ::String) at .\loading.jl:1105
 [9] include(::Module, ::String) at .\Base.jl:31
 [10] top-level scope at none:2
 [11] eval at .\boot.jl:330 [inlined]
 [12] eval(::Expr) at .\client.jl:425
 [13] top-level scope at .\none:3
in expression starting at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\lowlevel.jl:110
in expression starting at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\Libz.jl:11
caused by [exception 1]
could not load library "zlib1"
The specified module could not be found.

Stacktrace:
 [1] top-level scope at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\lowlevel.jl:110
 [2] include at .\boot.jl:328 [inlined]
 [3] include_relative(::Module, ::String) at .\loading.jl:1105
 [4] include at .\Base.jl:31 [inlined]
 [5] include(::String) at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\Libz.jl:3
 [6] top-level scope at C:\Users\jnoynaert\.julia\packages\Libz\zMAun\src\Libz.jl:11
 [7] include at .\boot.jl:328 [inlined]
 [8] include_relative(::Module, ::String) at .\loading.jl:1105
 [9] include(::Module, ::String) at .\Base.jl:31
 [10] top-level scope at none:2
 [11] eval at .\boot.jl:330 [inlined]
 [12] eval(::Expr) at .\client.jl:425
 [13] top-level scope at .\none:3
ERROR: Failed to precompile Libz [2ec943e9-cfe8-584d-b93d-64dcb6d567b7] to C:\Users\jnoynaert\.julia\compiled\v1.3\Libz\0KnGZ_UWRgs.ji.
Stacktrace:
 [1] error(::String) at .\error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at .\loading.jl:1283
 [3] _require(::Base.PkgId) at .\loading.jl:1024
 [4] require(::Base.PkgId) at .\loading.jl:922
 [5] require(::Module, ::Symbol) at .\loading.jl:917

Possibly related to JuliaIO/GZip.jl#84

[jnoynaert]

@kool7d if you are having this issue because you are on Windows like me, the issue is fixed on master, but not yet registered. In a new Julia session you can Pkg.develop(PackageSpec(url="https://github.com/BioJulia/Libz.jl")) and then using Libz should work as normal.

[kool7d]

Still doesn't work for me. I think upgrading to Julia 1.3 broke it so I'm going back to 1.2

OK, so zlib1.dll is not in the bin folder for 1.3, so I copied it from 1.2 and it seems to be working