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-rw-r--r--lib/dialyzer/src/dialyzer_callgraph.erl18
1 files changed, 15 insertions, 3 deletions
diff --git a/lib/dialyzer/src/dialyzer_callgraph.erl b/lib/dialyzer/src/dialyzer_callgraph.erl
index 68f3d7a240..8f6a3b99b3 100644
--- a/lib/dialyzer/src/dialyzer_callgraph.erl
+++ b/lib/dialyzer/src/dialyzer_callgraph.erl
@@ -285,7 +285,7 @@ module_postorder(#callgraph{digraph = DG}) ->
Nodes = sets:from_list([M || {M,_F,_A} <- digraph_vertices(DG)]),
MDG = digraph:new([acyclic]),
digraph_confirm_vertices(sets:to_list(Nodes), MDG),
- Foreach = fun({M1,M2}) -> digraph:add_edge(MDG, M1, M2) end,
+ Foreach = fun({M1,M2}) -> _ = digraph:add_edge(MDG, M1, M2) end,
lists:foreach(Foreach, sets:to_list(Edges)),
{digraph_utils:topsort(MDG), {'d', MDG}}.
@@ -305,7 +305,7 @@ module_deps(#callgraph{digraph = DG}) ->
Nodes = sets:from_list([M || {M,_F,_A} <- digraph_vertices(DG)]),
MDG = digraph:new(),
digraph_confirm_vertices(sets:to_list(Nodes), MDG),
- Foreach = fun({M1,M2}) -> digraph:add_edge(MDG, M1, M2) end,
+ Foreach = fun({M1,M2}) -> check_add_edge(MDG, M1, M2) end,
lists:foreach(Foreach, sets:to_list(Edges)),
Deps = [{N, ordsets:from_list(digraph:in_neighbours(MDG, N))}
|| N <- sets:to_list(Nodes)],
@@ -552,9 +552,21 @@ digraph_add_edge(From, To, DG) ->
false -> digraph:add_vertex(DG, To);
{To, _} -> ok
end,
- digraph:add_edge(DG, {From, To}, From, To, []),
+ check_add_edge(DG, {From, To}, From, To, []),
ok.
+check_add_edge(G, V1, V2) ->
+ case digraph:add_edge(G, V1, V2) of
+ {error, Error} -> exit({add_edge, V1, V2, Error});
+ _Edge -> ok
+ end.
+
+check_add_edge(G, E, V1, V2, L) ->
+ case digraph:add_edge(G, E, V1, V2, L) of
+ {error, Error} -> exit({add_edge, E, V1, V2, L, Error});
+ _Edge -> ok
+ end.
+
digraph_confirm_vertices([MFA|Left], DG) ->
digraph:add_vertex(DG, MFA, confirmed),
digraph_confirm_vertices(Left, DG);