It is not an error but a warning, so you can "hide" it by not activating warnings. I have seen this type of error many times, but other than it is estheticaly not pleasing, it does not necessarily mean that something is badly wrong.
IMO, all it means is that you were using a variable before it was properly initialised, IOW the variable exists but has no content (yet): so either there is something wrong with the logic flow of your program or you indeed intended to use the variable without content.
I have seen it sometimes appear in complicated print statements which internally are complied as a lot of concatenation operations. Lots of times however it is mostly harmless.
CountZero
"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law
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