Bug: Stata 18 MP4 (15nov2023) crashes on regexmatch() in gen on MacOS

[Ilya Bolotov]

Good day! I'm sorry to bring up the topic of crashing again, but I'm experiencing problems with this line of code:

 cap gen D_FVA = regexmatch(ROW, "^IMP_")

Stata 18 MP4 (15nov2023) crashes on it both in CLI and in GUI, no errors are displayed. I have MacOS of the latest version.

On the contrary,

 list if regexmatch(ROW, "^IMP_")

and

 drop if regexmatch(ROW, "^IMP_")

work fine.

Maybe the issue can be fixed in future updates? Thank you!

[Hua Peng (StataCorp)]

This is a bug. The newly introduced (Stata18) regexmatch() function, when run in StataMP and if the dataset is large enough to trigger parallelized code, will crash Stata. We will get it fixed in the next update. Meanwhile, you can use ustrregexm() as a work around:

 
 cap gen D_FVA =  ustrregexm(ROW, "^IMP_")

[Ilya Bolotov]

This is a bug. The newly introduced (Stata18) regexmatch() function, when run in StataMP and if the dataset is large enough to trigger parallelized code, will crash Stata. We will get it fixed in the next update. Meanwhile, you can use ustrregexm() as a work around:

cap gen D_FVA = ustrregexm(ROW, "^IMP_")

Thanks! I used:

cap gen D_FVA = strpos(ROW, "IMP_") == 1