diff --git a/cl/_testgo/closure2/in.go b/cl/_testgo/closure2/in.go
new file mode 100644
index 000000000..33f0683b3
--- /dev/null
+++ b/cl/_testgo/closure2/in.go
@@ -0,0 +1,11 @@
+package main
+
+func main() {
+	x := 1
+	f := func(i int) func(int) {
+		return func(i int) {
+			println("closure", i, x)
+		}
+	}
+	f(1)(2)
+}
diff --git a/cl/_testgo/closure2/out.ll b/cl/_testgo/closure2/out.ll
new file mode 100644
index 000000000..9878e0f50
--- /dev/null
+++ b/cl/_testgo/closure2/out.ll
@@ -0,0 +1,96 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [7 x i8] c"closure", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  store i64 1, ptr %2, align 4
+  %3 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %4 = getelementptr inbounds { ptr }, ptr %3, i32 0, i32 0
+  store ptr %2, ptr %4, align 8
+  %5 = alloca { ptr, ptr }, align 8
+  %6 = getelementptr inbounds { ptr, ptr }, ptr %5, i32 0, i32 0
+  store ptr @"main.main$1", ptr %6, align 8
+  %7 = getelementptr inbounds { ptr, ptr }, ptr %5, i32 0, i32 1
+  store ptr %3, ptr %7, align 8
+  %8 = load { ptr, ptr }, ptr %5, align 8
+  %9 = extractvalue { ptr, ptr } %8, 1
+  %10 = extractvalue { ptr, ptr } %8, 0
+  %11 = call { ptr, ptr } %10(ptr %9, i64 1)
+  %12 = extractvalue { ptr, ptr } %11, 1
+  %13 = extractvalue { ptr, ptr } %11, 0
+  call void %13(ptr %12, i64 2)
+  ret i32 0
+}
+
+define { ptr, ptr } @"main.main$1"(ptr %0, i64 %1) {
+_llgo_0:
+  %2 = load { ptr }, ptr %0, align 8
+  %3 = extractvalue { ptr } %2, 0
+  %4 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %5 = getelementptr inbounds { ptr }, ptr %4, i32 0, i32 0
+  store ptr %3, ptr %5, align 8
+  %6 = alloca { ptr, ptr }, align 8
+  %7 = getelementptr inbounds { ptr, ptr }, ptr %6, i32 0, i32 0
+  store ptr @"main.main$1$1", ptr %7, align 8
+  %8 = getelementptr inbounds { ptr, ptr }, ptr %6, i32 0, i32 1
+  store ptr %4, ptr %8, align 8
+  %9 = load { ptr, ptr }, ptr %6, align 8
+  ret { ptr, ptr } %9
+}
+
+define void @"main.main$1$1"(ptr %0, i64 %1) {
+_llgo_0:
+  %2 = load { ptr }, ptr %0, align 8
+  %3 = extractvalue { ptr } %2, 0
+  %4 = load i64, ptr %3, align 4
+  %5 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 0
+  store ptr @0, ptr %6, align 8
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 1
+  store i64 7, ptr %7, align 4
+  %8 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %5, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %8)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %4)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  ret void
+}
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
diff --git a/cl/_testgo/defer6/in.go b/cl/_testgo/defer6/in.go
new file mode 100644
index 000000000..252aa45e5
--- /dev/null
+++ b/cl/_testgo/defer6/in.go
@@ -0,0 +1,11 @@
+package main
+
+/*
+#include <stdlib.h>
+*/
+import "C"
+
+func main() {
+	p := C.malloc(1024)
+	defer C.free(p)
+}
diff --git a/cl/_testgo/defer6/out.ll b/cl/_testgo/defer6/out.ll
new file mode 100644
index 000000000..47163382c
--- /dev/null
+++ b/cl/_testgo/defer6/out.ll
@@ -0,0 +1,204 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.Defer" = type { ptr, i64, ptr, ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+
+@"github.com/goplus/llgo/internal/runtime.cgoAlwaysFalse" = external global i1, align 1
+@_cgo_cba5d90e7ea4_Cfunc__Cmalloc = external global i8, align 1
+@_cgo_cba5d90e7ea4_Cfunc_free = external global i8, align 1
+@main._cgo_cba5d90e7ea4_Cfunc__Cmalloc = global ptr null, align 8
+@main._cgo_cba5d90e7ea4_Cfunc_free = global ptr null, align 8
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@__llgo_defer = linkonce global i32 0, align 4
+@_llgo_Pointer = linkonce global ptr null, align 8
+
+define [0 x i8] @main._Cfunc_free(ptr %0) {
+_llgo_0:
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  %2 = load ptr, ptr @main._cgo_cba5d90e7ea4_Cfunc_free, align 8
+  %3 = load ptr, ptr %2, align 8
+  %4 = call [0 x i8] %3(ptr %0)
+  ret [0 x i8] %4
+}
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @syscall.init()
+  call void @"main.init$after"()
+  store ptr @_cgo_cba5d90e7ea4_Cfunc_free, ptr @main._cgo_cba5d90e7ea4_Cfunc_free, align 8
+  store ptr @_cgo_cba5d90e7ea4_Cfunc__Cmalloc, ptr @main._cgo_cba5d90e7ea4_Cfunc__Cmalloc, align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  %3 = call ptr @malloc(i64 1024)
+  store ptr %3, ptr %2, align 8
+  %4 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %5 = getelementptr inbounds { ptr }, ptr %4, i32 0, i32 0
+  store ptr %2, ptr %5, align 8
+  %6 = alloca { ptr, ptr }, align 8
+  %7 = getelementptr inbounds { ptr, ptr }, ptr %6, i32 0, i32 0
+  store ptr @"main.main$1", ptr %7, align 8
+  %8 = getelementptr inbounds { ptr, ptr }, ptr %6, i32 0, i32 1
+  store ptr %4, ptr %8, align 8
+  %9 = load { ptr, ptr }, ptr %6, align 8
+  %10 = extractvalue { ptr, ptr } %9, 1
+  %11 = extractvalue { ptr, ptr } %9, 0
+  %12 = call { ptr, ptr } %11(ptr %10)
+  %13 = load i32, ptr @__llgo_defer, align 4
+  %14 = call ptr @pthread_getspecific(i32 %13)
+  %15 = alloca i8, i64 196, align 1
+  %16 = alloca i8, i64 40, align 1
+  %17 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 0
+  store ptr %15, ptr %17, align 8
+  %18 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 1
+  store i64 0, ptr %18, align 4
+  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 2
+  store ptr %14, ptr %19, align 8
+  %20 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 3
+  store ptr blockaddress(@main, %_llgo_2), ptr %20, align 8
+  %21 = call i32 @pthread_setspecific(i32 %13, ptr %16)
+  %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 1
+  %23 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 3
+  %24 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, i32 0, i32 4
+  %25 = call i32 @sigsetjmp(ptr %15, i32 0)
+  %26 = icmp eq i32 %25, 0
+  br i1 %26, label %_llgo_4, label %_llgo_5
+
+_llgo_1:                                          ; preds = %_llgo_3
+  ret i32 0
+
+_llgo_2:                                          ; preds = %_llgo_5, %_llgo_4
+  store ptr blockaddress(@main, %_llgo_3), ptr %23, align 8
+  %27 = load i64, ptr %22, align 4
+  %28 = extractvalue { ptr, ptr } %12, 1
+  %29 = extractvalue { ptr, ptr } %12, 0
+  call void %29(ptr %28)
+  %30 = load %"github.com/goplus/llgo/internal/runtime.Defer", ptr %16, align 8
+  %31 = extractvalue %"github.com/goplus/llgo/internal/runtime.Defer" %30, 2
+  %32 = call i32 @pthread_setspecific(i32 %13, ptr %31)
+  %33 = load ptr, ptr %24, align 8
+  indirectbr ptr %33, [label %_llgo_3, label %_llgo_6]
+
+_llgo_3:                                          ; preds = %_llgo_5, %_llgo_2
+  call void @"github.com/goplus/llgo/internal/runtime.Rethrow"(ptr %14)
+  br label %_llgo_1
+
+_llgo_4:                                          ; preds = %_llgo_0
+  store ptr blockaddress(@main, %_llgo_6), ptr %24, align 8
+  br label %_llgo_2
+
+_llgo_5:                                          ; preds = %_llgo_0
+  store ptr blockaddress(@main, %_llgo_3), ptr %24, align 8
+  %34 = load ptr, ptr %23, align 8
+  indirectbr ptr %34, [label %_llgo_3, label %_llgo_2]
+
+_llgo_6:                                          ; preds = %_llgo_2
+  ret i32 0
+}
+
+define { ptr, ptr } @"main.main$1"(ptr %0) {
+_llgo_0:
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  %2 = load { ptr }, ptr %0, align 8
+  %3 = extractvalue { ptr } %2, 0
+  %4 = load ptr, ptr %3, align 8
+  store ptr %4, ptr %1, align 8
+  %5 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %6 = getelementptr inbounds { ptr }, ptr %5, i32 0, i32 0
+  store ptr %1, ptr %6, align 8
+  %7 = alloca { ptr, ptr }, align 8
+  %8 = getelementptr inbounds { ptr, ptr }, ptr %7, i32 0, i32 0
+  store ptr @"main.main$1$1", ptr %8, align 8
+  %9 = getelementptr inbounds { ptr, ptr }, ptr %7, i32 0, i32 1
+  store ptr %5, ptr %9, align 8
+  %10 = load { ptr, ptr }, ptr %7, align 8
+  ret { ptr, ptr } %10
+}
+
+define void @"main.main$1$1"(ptr %0) {
+_llgo_0:
+  %1 = load { ptr }, ptr %0, align 8
+  %2 = extractvalue { ptr } %1, 0
+  %3 = load ptr, ptr %2, align 8
+  %4 = load ptr, ptr @_llgo_Pointer, align 8
+  %5 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %5, i32 0, i32 0
+  store ptr %4, ptr %6, align 8
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %5, i32 0, i32 1
+  store ptr %3, ptr %7, align 8
+  %8 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %5, align 8
+  %9 = extractvalue { ptr } %1, 0
+  %10 = load ptr, ptr %9, align 8
+  %11 = call [0 x i8] @main._Cfunc_free(ptr %10)
+  ret void
+}
+
+declare void @runtime.throw(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+declare void @syscall.init()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare ptr @malloc(i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare ptr @pthread_getspecific(i32)
+
+declare i32 @pthread_setspecific(i32, ptr)
+
+declare i32 @sigsetjmp(ptr, i32)
+
+declare void @"github.com/goplus/llgo/internal/runtime.Rethrow"(ptr)
+
+define void @"main.init$after"() {
+_llgo_0:
+  %0 = load ptr, ptr @_llgo_Pointer, align 8
+  %1 = icmp eq ptr %0, null
+  br i1 %1, label %_llgo_1, label %_llgo_2
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 58)
+  call void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr %2)
+  store ptr %2, ptr @_llgo_Pointer, align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  %3 = load i32, ptr @__llgo_defer, align 4
+  %4 = icmp eq i32 %3, 0
+  br i1 %4, label %_llgo_3, label %_llgo_4
+
+_llgo_3:                                          ; preds = %_llgo_2
+  %5 = call i32 @pthread_key_create(ptr @__llgo_defer, ptr null)
+  br label %_llgo_4
+
+_llgo_4:                                          ; preds = %_llgo_3, %_llgo_2
+  ret void
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.SetDirectIface"(ptr)
+
+declare i32 @pthread_key_create(ptr, ptr)
diff --git a/ssa/type_cvt.go b/ssa/type_cvt.go
index cfefe2273..df54d0b8f 100644
--- a/ssa/type_cvt.go
+++ b/ssa/type_cvt.go
@@ -92,6 +92,9 @@ func (p goTypes) cvtType(typ types.Type) (raw types.Type, cvt bool) {
 			return types.NewMap(key, elem), true
 		}
 	case *types.Struct:
+		if isClosure(t) {
+			return typ, false
+		}
 		return p.cvtStruct(t)
 	case *types.Named:
 		if v, ok := p.typbg.Load(namedLinkname(t)); ok && v.(Background) == InC {