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[Merged by Bors] - improve error message for attempting to add systems using add_system_to_stage #3287

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[Merged by Bors] - improve error message for attempting to add systems using add_system_to_stage #3287

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8 changes: 8 additions & 0 deletions crates/bevy_app/src/app.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -353,6 +353,10 @@ impl App {
stage_label: impl StageLabel,
system: impl IntoSystemDescriptor<Params>,
) -> &mut Self {
use std::any::TypeId;
if stage_label.type_id() == TypeId::of::<StartupStage>() {
panic!("add systems to a startup stage using App::add_startup_system_to_stage");
}
self.schedule.add_system_to_stage(stage_label, system);
self
}
Expand Down Expand Up @@ -383,6 +387,10 @@ impl App {
stage_label: impl StageLabel,
system_set: SystemSet,
) -> &mut Self {
use std::any::TypeId;
if stage_label.type_id() == TypeId::of::<StartupStage>() {
panic!("add system sets to a startup stage using App::add_startup_system_set_to_stage");
}
self.schedule
.add_system_set_to_stage(stage_label, system_set);
self
Expand Down