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# returning-data-from-temporary
Warns when returning the data from a `QByteArray` that will soon be destroyed.
## Examples
```
QByteArray b = ...;
return b.data();
```
```
return funcReturningByteArray().data();
return funcReturningByteArray().constData();
```
```
const char * getFoo()
{
QByteArray b = ...;
return b; // QByteArray can implicitly cast to char*
}
```
```
const char *c1 = getByteArray();
const char *c2 = str.toUtf8().data();
```
Note that in some cases it might be fine, since the method can return the data
of a global static QByteArray. However such code is brittle, it could start crashing
if it ceased to be static.
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