Demote unhandled_exception checks to checkSlow, encourage users to re…

…move them if needed #26
landelare · Jul 8, 2024 · 0b46424 · 0b46424
1 parent 96db8d3
commit 0b46424
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Showing 2 changed files with 10 additions and 2 deletions.
diff --git a/Source/UE5Coro/Private/Generator.cpp b/Source/UE5Coro/Private/Generator.cpp
@@ -36,7 +36,11 @@ using namespace UE5Coro::Private;
 void FGeneratorPromise::unhandled_exception()
 {
 #if PLATFORM_EXCEPTIONS_DISABLED
-	check(!"Exceptions are not supported");
+	// Hitting this can be a result of the generator itself invoking undefined
+	// behavior, e.g., by using a bad pointer.
+	// On Windows, SEH exceptions can end up here if C++ exceptions are disabled.
+	// If this hinders debugging, feel free to remove it!
+	checkSlow(!"Unhandled exception from generator!");
 #else
 	throw;
 #endif

diff --git a/Source/UE5Coro/Private/Promise.cpp b/Source/UE5Coro/Private/Promise.cpp
@@ -168,7 +168,11 @@ void FPromise::AddContinuation(std::function<void(void*)> Fn)
 void FPromise::unhandled_exception()
 {
 #if PLATFORM_EXCEPTIONS_DISABLED
-	check(!"Exceptions are not supported");
+	// Hitting this can be a result of the coroutine itself invoking undefined
+	// behavior, e.g., by using a bad pointer.
+	// On Windows, SEH exceptions can end up here if C++ exceptions are disabled.
+	// If this hinders debugging, feel free to remove it!
+	checkSlow(!"Unhandled exception from coroutine!");
 #else
 	bUnhandledException = true;
 	throw;