fix a crash case.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index 2283d85..d43f79b 100644
--- a/src/yuescript/yue_compiler.cpp
+++ b/src/yuescript/yue_compiler.cpp
@@ -75,7 +75,7 @@ static std::unordered_set<std::string> Metamethods = {
         "close"s // Lua 5.4
 };
 
-const std::string_view version = "0.21.4"sv;
+const std::string_view version = "0.21.5"sv;
 const std::string_view extension = "yue"sv;
 
 class CompileError : public std::logic_error {
@@ -3959,6 +3959,7 @@ private:
                                            expListAssign && expListAssign->action && expListAssign->action.is<Assign_t>()) {
                                 BLOCK_START
                                 auto unary = singleUnaryExpFrom(expListAssign->expList->exprs.back());
+                                BREAK_IF(!unary);
                                 BREAK_IF(!unary->ops.empty());
                                 auto value = static_cast<Value_t*>(unary->expos.front());
                                 auto simpleValue = value->item.as<SimpleValue_t>();