From 1aa2a26a341da05ff9420ac365b967b8be2d84a7 Mon Sep 17 00:00:00 2001
From: Jamu Kakar <jkakar@kakar.ca>
Date: Wed, 26 Jun 2019 22:13:53 -0700
Subject: rebar3 dialyzer: Warn when debug_info is disable

---
 src/rebar_prv_dialyzer.erl | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/rebar_prv_dialyzer.erl b/src/rebar_prv_dialyzer.erl
index 82b4012..500b591 100644
--- a/src/rebar_prv_dialyzer.erl
+++ b/src/rebar_prv_dialyzer.erl
@@ -474,6 +474,13 @@ proj_files(State) ->
     get_files(State, Apps, PltApps, [], PltMods).
 
 run_dialyzer(State, Opts, Output) ->
+    case debug_info(State) of
+        true ->
+            ok;
+        false ->
+            ?WARN("Add {erl_opts, [debug_info]} to rebar.config if Dialyzer fails to load Core Erlang.", []),
+            ok
+    end,
     %% dialyzer may return callgraph warnings when get_warnings is false
     case proplists:get_bool(get_warnings, Opts) of
         true ->
@@ -539,6 +546,10 @@ get_config(State, Key, Default) ->
     Config = rebar_state:get(State, dialyzer, []),
     proplists:get_value(Key, Config, Default).
 
+debug_info(State) ->
+    Config = rebar_state:get(State, erl_opts, []),
+    proplists:get_value(debug_info, Config, false).
+
 -spec collect_nested_dependent_apps([atom()]) -> [atom()].
 collect_nested_dependent_apps(RootApps) ->
     Deps = lists:foldl(fun collect_nested_dependent_apps/2, sets:new(), RootApps),
-- 
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