fix: check application in 7TV event-api (#5768)

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unversioned
 
+- Bugfix: Fixed a crash in the 7TV EventApi when closing Chatterino. (#5768)
 - Bugfix: Fixed scrollbar highlights being visible in overlay windows. (#5769)
 - Bugfix: Make macos fonts look the same as v2.5.1. (#5775)
 - Bugfix: Fixed 7TV usernames messing with Qt's HTML (#5780)

src/providers/seventv/SeventvEventAPI.cpp

@@ -363,7 +363,13 @@ void SeventvEventAPI::onUserUpdate(const Dispatch &dispatch)
 
 void SeventvEventAPI::onCosmeticCreate(const CosmeticCreateDispatch &cosmetic)
 {
-    auto *badges = getApp()->getSeventvBadges();
+    auto *app = tryGetApp();
+    if (!app)
+    {
+        return;  // shutting down
+    }
+
+    auto *badges = app->getSeventvBadges();
     switch (cosmetic.kind)
     {
         case CosmeticKind::Badge: {
@@ -378,7 +384,13 @@ void SeventvEventAPI::onCosmeticCreate(const CosmeticCreateDispatch &cosmetic)
 void SeventvEventAPI::onEntitlementCreate(
     const EntitlementCreateDeleteDispatch &entitlement)
 {
-    auto *badges = getApp()->getSeventvBadges();
+    auto *app = tryGetApp();
+    if (!app)
+    {
+        return;  // shutting down
+    }
+
+    auto *badges = app->getSeventvBadges();
     switch (entitlement.kind)
     {
         case CosmeticKind::Badge: {
@@ -394,7 +406,13 @@ void SeventvEventAPI::onEntitlementCreate(
 void SeventvEventAPI::onEntitlementDelete(
     const EntitlementCreateDeleteDispatch &entitlement)
 {
-    auto *badges = getApp()->getSeventvBadges();
+    auto *app = tryGetApp();
+    if (!app)
+    {
+        return;  // shutting down
+    }
+
+    auto *badges = app->getSeventvBadges();
     switch (entitlement.kind)
     {
         case CosmeticKind::Badge: {