JuliaIO
No applicable_loaders found for UNKNOWN
I want to loop over the following code in an IJulia notebook:
using Images,FileWatching
event = watch_file("test.png")
if event.timedout
display("timeout")
end
display(load("test.png"))
The first execution works as expected, however, during the second execution I get the following error message
No applicable_loaders found for UNKNOWN
Stacktrace:
[1] error(s::String)
@ Base ./error.jl:33
[2] applicable_loaders
@ ~/.julia/packages/FileIO/40aie/src/loadsave.jl:11 [inlined]
[3] load(::String; options::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ FileIO ~/.julia/packages/FileIO/40aie/src/loadsave.jl:112
[4] load(::String)
@ FileIO ~/.julia/packages/FileIO/40aie/src/loadsave.jl:110
[5] top-level scope
@ In[7]:6
[6] eval
@ ./boot.jl:360 [inlined]
[7] include_string(mapexpr::typeof(REPL.softscope), mod::Module, code::String, filename::String)
@ Base ./loading.jl:1094
and after executing the code yet another time additionally the following
┌ Error: There was an error in magic function detect_rdata.
│ Please open an issue at FileIO.jl.
│ exception = (EOFError(), Union{Ptr{Nothing}, Base.InterpreterIP}[Ptr{Nothing} @0x0000000116cf51a4, Ptr{Nothing} @0x000000011303fc78, Ptr{Nothing} @0x000000011303fe6f, Ptr{Nothing} @0x000000010a0b09ef, Ptr{Nothing} @0x0000000113013cf9, Ptr{Nothing} @0x00000001130146d7, Ptr{Nothing} @0x00000001130155fa, Ptr{Nothing} @0x00000001130157c8, Ptr{Nothing} @0x0000000113015999, Ptr{Nothing} @0x0000000113010e44, Ptr{Nothing} @0x0000000113012a69, Ptr{Nothing} @0x0000000113012cfe, Ptr{Nothing} @0x000000010a0b09ef, Ptr{Nothing} @0x000000010a0c773f, Ptr{Nothing} @0x000000010a0c6094, Ptr{Nothing} @0x000000010a0c640c, Base.InterpreterIP in top-level CodeInfo for Main at statement 0, Ptr{Nothing} @0x000000010a0e0d44, Ptr{Nothing} @0x000000010a0e0b04, Ptr{Nothing} @0x000000010a0e1634, Ptr{Nothing} @0x0000000112ff009c, Ptr{Nothing} @0x0000000112ff04f9, Ptr{Nothing} @0x000000010a0b09ef, Ptr{Nothing} @0x0000000112ffe855, Ptr{Nothing} @0x000000010a0b09ef, Ptr{Nothing} @0x000000010a0bd269, Ptr{Nothing} @0x0000000112fdeb62, Ptr{Nothing} @0x0000000112fdeed4, Ptr{Nothing} @0x0000000112fdeeec, Ptr{Nothing} @0x000000010a0b09ef, Ptr{Nothing} @0x000000010a0cba7d])
└ @ FileIO /Users/paul/.julia/packages/FileIO/40aie/src/query.jl:145
I'm using Julia 1.6 and Images v0.24.1.
I can reproduce the same error in the REPL.
By the way, the image is overwritten after launch and results in the event FileWatching.FileEvent(false, true, false).
I'm not clear how test.png is changed so can't reproduce it faithfully.
It seems that there is some data race happening here. IIUC from the description, a file is changed doesn't necessarily mean the file is complete. Maybe we need a higher-level API on watch_file to deal with the data racing issue, e.g., on_file_change(file; callback). In this case, callback = file->display(load(file)).
The detect_rdata issue is related to #338
