Creating table columns in a parfor loop

Found this buggy behaviour when creating tables in a parfor loop. The first example (doesn't work) causes the parallel pool worker to crash and gives a "Segmentation Violation" error in the crash dump file. However, in the second example (works), including any character that needs escaping (i.e. -, +, etc) in the table column title avoids the error.

%doesnt work
parpool('local', 1);
parfor i=1
     temptab = table();
     temptab.('var1') = ['a';'b'];
end

%works
parpool('local', 1);
parfor i=1
    temptab = table();
    temptab.('var-1') = ['a';'b'];
end

[Matt J]

Something in your environment. Both work fine for me.

[Raymond Norris]

I tried this with R2023b on Windows 11 and the first example crashed for me as well. Which versions/OS are you guys running @asdfg asdfg @Matt J?

[Damian Pietrus]

@Raymond Norris First example crashes for me as well, also on R2023b and Win 11. The R2024a Prerelease works for me correctly however

[asdfg asdfg]

I tried on Mac on R2023b

[Matt J]

R2023b Windows 10.

[Raymond Norris]

Good thought, @Damian Pietrus. R2024a prerelease also works for me. So,

@asdfg asdfg has problems with R2023b (Mac)

@Damian Pietrus and @Raymond Norris have problems with R2023b (Windows 11)

@Matt J works fine with R2023b (Windows 10)

My next thought is the release Update. But I'm runnig GR (Update 0) and Damian's running the latest (Update 5).

@asdfg asdfg if you need this working on macOS R2023b, I'd suggest contacting MathWorks Technical Support. Otherwise, consider trying R2024a Prerelease.