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[light] Fix dangling reference in compute_color_mode causing memory corruption

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This commit is contained in:
J. Nick Koston
2025-11-12 10:33:19 -06:00
parent 56d141c741
commit c1fb8dae37
1 changed files with 5 additions and 1 deletions
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6
esphome/components/light/light_call.cpp
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@@ -406,7 +406,11 @@ void LightCall::transform_parameters_() {
}
}
ColorMode LightCall::compute_color_mode_() {
const auto &supported_modes = this->parent_->get_traits().get_supported_color_modes();
// Store traits locally to avoid dangling reference: get_traits() returns by value, so
// calling get_traits().get_supported_color_modes() would create a temporary LightTraits
// object, return a reference to its member, then destroy the temporary, leaving a dangling reference.
auto traits = this->parent_->get_traits();
const auto &supported_modes = traits.get_supported_color_modes();
int supported_count = supported_modes.size();
// Some lights don't support any color modes (e.g. monochromatic light), leave it at unknown.