On 10/29/16 8:55 PM, rikki cattermole wrote:
On 30/10/2016 10:47 AM, Mergul wrote:
Application always crash when I'm using android_app.savedState.
if (state.savedState != null) {
// We are starting with a previous saved state; restore from it.
engine.state = *cast(saved_state*)state.savedState; //crash!
}
Don't compare against null using =, compare using is.
if (state.savedState !is null) {
android_app.savedState appears to be defined here:
https://github.com/joakim-noah/android/blob/polish/android_native_app_glue.d#L56
It's a void *. So comparing against null with != is identical to !is.
There are actually cases where comparing against null with != is valid,
and what you want exactly (e.g. comparing a string to null to check for
empty string).
In this case, fixing the comparison is not the answer. What is happening
is one of several things:
1. I don't know what type `engine` is, so if it's a pointer, then
dereferencing the state member may be the culprit if engine is invalid.
2. If state is a pointer, then you could be crashing at the if statement
(unlikely).
3. state or state.savedState isn't being properly initialized.
4. Something else (e.g. code generation error). Hope it's not this one.
-Steve
