qstringlist array crashes program

[chrisb123]

Can someone explain this
This works

QString usage = "12.34 56.78";
 QStringList usage2 = usage.split(" ");
   foreach (QString str, usage2) { 
     qDebug() << str;    
    }

QString usage = "12.34 56.78";
 QStringList usage2 = usage.split(" ");
   foreach (QString str, usage2) { 
     qDebug() << str;    
    }

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This works

float used = usage2[0].toFloat();

float used = usage2[0].toFloat();

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This does not work

float used = usage2[1].toFloat();

float used = usage2[1].toFloat();

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[jano_alex_es]

seems like usage2 is rewritten somewhere

[scascio]

I tested the code provided and it worked.

So the error is not coming from these instructions

[wysota]

The space character is probably not the space character but some other whitespace.

[chrisb123]

here is a bit more information
my programming skills are bad so there is probably a fundamental error somewhere, porbably in the header file but...
a timer calls a public slot function "update" which reads a file containining a single line of data and assings it to usage
if i extract the data from usage in this function I can use
if i extract this data elsewhere it crashes
.... hmmm just sovlved the problem

The reason was the variable was empty, I just needed to call the function first