diff --git a/Makefile b/Makefile
index 80dadb3..da2c5b9 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ test: local
 	@$(REBAR) as local eunit
 
 ebin/%.beam: src/%.erl
-	erlc -o $(dir $@) $<
+	erlc +debug_info -o $(dir $@) $<
 
 $(GENERATED_SRC): $(GENERATOR_DEPS)
 	erl -pa ebin/ -noshell -s aeb_fate_generate_ops gen_and_halt src/ include/
diff --git a/rebar3 b/rebar3
index ea5a116..a83d554 100755
Binary files a/rebar3 and b/rebar3 differ
diff --git a/src/aeb_fate_asm.erl b/src/aeb_fate_asm.erl
index 5dddcc6..e53b225 100644
--- a/src/aeb_fate_asm.erl
+++ b/src/aeb_fate_asm.erl
@@ -356,7 +356,7 @@ parse_tuple(Tokens) ->
 
 
 parse_variant([{start_variant,_line}
-              , {'[', _line}
+              , {'[', _}
               | Rest]) ->
     {Arities, Rest2} = parse_list(Rest),
     %% Make sure Arities is a list of bytes.
@@ -364,7 +364,7 @@ parse_variant([{start_variant,_line}
                     is_integer(A), A < 256],
 
     [{'|',_}
-    , {int,_line, Tag}
+    , {int,_, Tag}
     , {'|',_}
     , {'(',_} | Rest3] = Rest2,
     {Elements , [{end_variant, _} | Rest4]} = parse_tuple(Rest3),