MethodError: convert has no method matching convert(::Type{Ptr{GSL.gsl_sf_result}}, ::Array{GSL.gsl_sf_result,1})

[jeff-regier]

With Julia 0.4 (but not with Julia 0.3), the unit tests for GSL don't pass on my system (Ubuntu Trusty, with libgsl 1.16 installed). I get the error message below:

julia> Pkg.clone("https://github.com/jiahao/GSL.jl.git")
INFO: Cloning GSL from https://github.com/jiahao/GSL.jl.git
INFO: Computing changes...
INFO: No packages to install, update or remove
INFO: Package database updated

julia> Pkg.build("GSL")
INFO: Building GSL
WARNING: beginswith is deprecated, use startswith instead.
 in depwarn at ./deprecated.jl:40
 in beginswith at deprecated.jl:10
 in available_versions at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:116
 in package_available at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:111
 in can_provide at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:608
 in _find_library at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:451
 in satisfy! at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:738 (repeats 2 times)
 in anonymous at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:778
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in evalfile at loading.jl:174 (repeats 2 times)
 in anonymous at pkg/entry.jl:626
 in cd at ./file.jl:20
 in build! at pkg/entry.jl:625
 in build at pkg/entry.jl:637
 in anonymous at pkg/dir.jl:29
 in cd at file.jl:20
 in cd at pkg/dir.jl:29
 in build at pkg.jl:62
WARNING: beginswith is deprecated, use startswith instead.
 in depwarn at ./deprecated.jl:40
 in beginswith at deprecated.jl:10
 in available_versions at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:124
 in package_available at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:111
 in can_provide at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:608
 in _find_library at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:451
 in satisfy! at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:738 (repeats 2 times)
 in anonymous at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:778
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in evalfile at loading.jl:174 (repeats 2 times)
 in anonymous at pkg/entry.jl:626
 in cd at ./file.jl:20
 in build! at pkg/entry.jl:625
 in build at pkg/entry.jl:637
 in anonymous at pkg/dir.jl:29
 in cd at file.jl:20
 in cd at pkg/dir.jl:29
 in build at pkg.jl:62

julia> Pkg.test("GSL")
INFO: Testing GSL
WARNING: beginswith is deprecated, use startswith instead.
 in depwarn at ./deprecated.jl:40
 in beginswith at deprecated.jl:10
 in available_versions at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:116
 in package_available at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:111
 in can_provide at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:608
 in _find_library at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:451
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in reload_path at ./loading.jl:156
 in _require at ./loading.jl:68
 in require at ./loading.jl:51
 in include at ./boot.jl:250
 in include_from_node1 at loading.jl:132
 in process_options at ./client.jl:308
 in _start at ./client.jl:407
WARNING: beginswith is deprecated, use startswith instead.
 in depwarn at ./deprecated.jl:40
 in beginswith at deprecated.jl:10
 in available_versions at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:124
 in package_available at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:111
 in can_provide at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:608
 in _find_library at /home/jeff/.julia/v0.4/BinDeps/src/dependencies.jl:451
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in reload_path at ./loading.jl:156
 in _require at ./loading.jl:68
 in require at ./loading.jl:51
 in include at ./boot.jl:250
 in include_from_node1 at loading.jl:132
 in process_options at ./client.jl:308
 in _start at ./client.jl:407
WARNING: int(x::FloatingPoint) is deprecated, use round(Int,x) instead.
 in depwarn at ./deprecated.jl:40
 in int at deprecated.jl:29
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in include at ./boot.jl:250
 in include_from_node1 at loading.jl:132
 in process_options at ./client.jl:308
 in _start at ./client.jl:407
ERROR: LoadError: LoadError: MethodError: `convert` has no method matching convert(::Type{Ptr{GSL.gsl_sf_result}}, ::Array{GSL.gsl_sf_result,1})
This may have arisen from a call to the constructor Ptr{GSL.gsl_sf_result}(...),
since type constructors fall back to convert methods.
Closest candidates are:
  convert{T}(::Type{Ptr{T}}, ::UInt64)
  convert{T}(::Type{Ptr{T}}, ::Int64)
  convert{T}(::Type{Ptr{T}}, ::Ptr{T})
  ...
 in anonymous at no file:16
 in include at ./boot.jl:250
 in include_from_node1 at ./loading.jl:132
 in include at ./boot.jl:250
 in include_from_node1 at loading.jl:132
 in process_options at ./client.jl:308
 in _start at ./client.jl:407
while loading /home/jeff/.julia/v0.4/GSL/test/basic.jl, in expression starting on line 11
while loading /home/jeff/.julia/v0.4/GSL/test/runtests.jl, in expression starting on line 7

[jiahao]

I believe this is an instance of what @JeffBezanson described in #27, that the Ptr{} syntax in the ccall should not be used. I'll try to fix it.

[jiahao]

I believe this issue should be fixed on master now. Will tag a new release.