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-rw-r--r--src/common/fiber.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/common/fiber.cpp b/src/common/fiber.cpp
index 62010d762..81b212e4b 100644
--- a/src/common/fiber.cpp
+++ b/src/common/fiber.cpp
@@ -124,7 +124,10 @@ void Fiber::YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to) {
// "from" might no longer be valid if the thread was killed
if (auto from = weak_from.lock()) {
- ASSERT(from->impl->previous_fiber != nullptr);
+ if (from->impl->previous_fiber == nullptr) {
+ ASSERT_MSG(false, "previous_fiber is nullptr!");
+ return;
+ }
from->impl->previous_fiber->impl->context = transfer.fctx;
from->impl->previous_fiber->impl->guard.unlock();
from->impl->previous_fiber.reset();