Write rebar3.crashdump on errors

src/rebar3.erl

@@ -265,7 +265,8 @@ handle_error({error, rebar_abort}) ->
 handle_error({error, {Module, Reason}}) ->
     case code:which(Module) of
         non_existing ->
-            ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace", []),
+            file:write_file("rebar3.crashdump", io_lib:fwrite("~p: ~p~n~p~n~n", [Module, Reason, erlang:get_stacktrace()])),
+            ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace rebar3.crashdump", []),
             ?DEBUG("Uncaught error: ~p ~p", [Module, Reason]),
             ?INFO("When submitting a bug report, please include the output of `rebar3 report \"your command\"`", []);
         _ ->
@@ -278,7 +279,8 @@ handle_error({error, Error}) when is_list(Error) ->
 handle_error(Error) ->
     %% Nothing should percolate up from rebar_core;
     %% Dump this error to console
-    ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace", []),
+    file:write_file("rebar3.crashdump", io_lib:fwrite("Error: ~p~n~p~n~n", [Error, erlang:get_stacktrace()])),
+    ?ERROR("Uncaught error in rebar_core. Run with DEBUG=1 to see stacktrace or consult rebar3.crashdump", []),
     ?DEBUG("Uncaught error: ~p", [Error]),
     case erlang:get_stacktrace() of
         [] -> ok;

src/rebar_state.erl

@@ -417,7 +417,8 @@ create_logic_providers(ProviderModules, State0) ->
     catch
         C:T ->
             ?DEBUG("~p: ~p ~p", [C, T, erlang:get_stacktrace()]),
-            throw({error, "Failed creating providers. Run with DEBUG=1 for stacktrace."})
+            file:write_file("rebar3.crashdump", io_lib:fwrite("~p: ~p~n~p~n~n~p", [C, T, erlang:get_stacktrace(), State0])),
+            throw({error, "Failed creating providers. Run with DEBUG=1 for stacktrace rebar3.crashdump."})
     end.
 
 to_list(#state_t{} = State) ->