3 files changed, 26 insertions, 10 deletions

diff --git a/spec/inputs/in_expression.yue b/spec/inputs/in_expression.yue
index 0b2a87a..e854083 100644
--- a/spec/inputs/in_expression.yue
+++ b/spec/inputs/in_expression.yue
@@ -72,6 +72,8 @@ do
                         2
                         x: 3
                 }
-
+        print a in []
+        a = 1
+        print a in {}
 nil
 
diff --git a/spec/outputs/in_expression.lua b/spec/outputs/in_expression.lua
index b99be8a..3ccab0c 100644
--- a/spec/outputs/in_expression.lua
+++ b/spec/outputs/in_expression.lua
@@ -206,5 +206,11 @@ do
                         b = not _find_0
                 end
         end
+        print((function()
+                local _val_0 = a
+                return false
+        end)())
+        local a = 1
+        print((false))
 end
 return nil
diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index 5cdbfda..30800e6 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 = "0.21.7"sv;
+const std::string_view version = "0.21.8"sv;
 const std::string_view extension = "yue"sv;
 
 class CompileError : public std::logic_error {
@@ -6162,10 +6162,14 @@ private:
                                 if (unary_exp->inExp->not_) {
                                         _buf << "not ("sv;
                                 }
-                                for (const auto& exp : tmp) {
-                                        _buf << exp << " == "sv << newVar;
-                                        if (exp != tmp.back()) {
-                                                _buf << " or "sv;
+                                if (tmp.empty()) {
+                                        _buf << "false"sv;
+                                } else {
+                                        for (const auto& exp : tmp) {
+                                                _buf << exp << " == "sv << newVar;
+                                                if (exp != tmp.back()) {
+                                                        _buf << " or "sv;
+                                                }
                                         }
                                 }
                                 if (unary_exp->inExp->not_) {
@@ -6203,10 +6207,14 @@ private:
                                         _buf << "not "sv;
                                 }
                                 _buf << '(';
-                                for (const auto& exp : tmp) {
-                                        _buf << exp << " == "sv << varName;
-                                        if (exp != tmp.back()) {
-                                                _buf << " or "sv;
+                                if (tmp.empty()) {
+                                        _buf << "false"sv;
+                                } else {
+                                        for (const auto& exp : tmp) {
+                                                _buf << exp << " == "sv << varName;
+                                                if (exp != tmp.back()) {
+                                                        _buf << " or "sv;
+                                                }
                                         }
                                 }
                                 _buf << ')';