diff --git a/core/asm.c b/core/asm.c
index c4ba674b..4de92059 100644
--- a/core/asm.c
+++ b/core/asm.c
@@ -832,6 +832,7 @@ Dst dst_asm_decode_instruction(uint32_t instr) {
                     dst_wrap_integer((int32_t)instr >> 24));
     }
 #undef oparg
+    return dst_wrap_nil();
 }
 
 Dst dst_disasm(DstFuncDef *def) {
diff --git a/core/compile.c b/core/compile.c
index 001d1c1d..6c4d9d15 100644
--- a/core/compile.c
+++ b/core/compile.c
@@ -856,7 +856,6 @@ static void dstc_deinit(DstCompiler *c) {
 DstCompileResult dst_compile(DstCompileOptions opts) {
     DstCompiler c;
     DstFopts fopts;
-    DstSlot s;
 
     dstc_init(&c, opts.env);
 
@@ -871,7 +870,7 @@ DstCompileResult dst_compile(DstCompileOptions opts) {
     fopts.x = opts.source;
 
     /* Compile the value */
-    s = dstc_value(fopts);
+    dstc_value(fopts);
 
     if (c.result.status == DST_COMPILE_OK) {
         c.result.funcdef = dstc_pop_funcdef(&c);