I’m trying to find my NaN generator. I think it is due to an uninitialized input variable without proper protection in the code. I know the debugger doesn’t have a nan break and it is very difficult for me to get to the spot. My thought was, can I somehow override the base./ function call to do a…

Maybe you can use https://github.com/JeffreySarnoff/SaferIntegers.jl to spot your problem. It Helped me to catch silent overflows.

Thanks for the tip. I need it for floating point calculations though.

See this issue for discussion and some options: https://github.com/JuliaLang/julia/issues/27705

You are welcome to NaNcatcher.jl , an experiment of mine. There is some description within the file. If it seems helpful and you have questions … I am around.

[image] Allan_Baker: I know the debugger doesn’t have a nan break and it is very difficult for me to get to the spot. If it’s NaNs in an AbstractArray, can you put a conditional breakpoint in the setindex! method for your specific array that’s receiving the NaNs?

I have a half-completed attempt at using a Cassette pass to find the first NaN that gets returned from any function. Needs some more work, but it found the NaN I was hunting for and then I moved on: https://github.com/mbauman/TheNaNTrap.jl/

I ended up brute forcing it and searching for all of the divides for 0/0 protection and using @info statements to bark about NaNs and working my way through the call tree to find where things went wrong. Running in the interactive debugger is too cumbersome because I can’t set breakpoints multi-lev…

This may help, if nothing is precompiled or handed to C and you work in the REPL, setting this first then including other functions. I have not tried this strategy – so here’s hoping. julia> (/)(x::Float64, y::Float64) = iszero(y) && iszero(x) ? "found it" : Base.:(/)(x,y) julia> 1.0 / 0.0, 0…

The easiest way to answer these kinds of questions is empiricism. Don’t hesitate to just try this out. One session: julia> Base.:(/)(x::Float64, y::Float64) = 1.0 julia> using Distributions julia> pdf(Normal(0.0, 1.0), 5.0) 1.0 julia> pdf(Normal(0.0, 1.0), 10.0) 1.0 Another session: julia> us…

NaN Detector

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Allan_Baker February 24, 2021, 2:09pm 10

I was thinking this might work, but if I’m pulling in packages, do I need to go into each package and define this?

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NaN Detector

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