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

General Usage

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?

Topic		Replies	Views
Treating NaN as error: Helping debugging General Usage question , debugging , nan	19	4093	October 29, 2024
Division by zero runs without warning -> complicates finding bugs Internals & Design question	31	3264	May 17, 2024
Return NaN instead of DomainError General Usage	21	3035	July 26, 2019
When to return NaN vs throw an Error? General Usage question	17	1457	November 12, 2022
Support for signaling NaNs? General Usage question , nan	1	958	November 19, 2024

NaN Detector

Related topics