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-rw-r--r--backends/btor/btor.cc8
1 files changed, 7 insertions, 1 deletions
diff --git a/backends/btor/btor.cc b/backends/btor/btor.cc
index 91f238fa5..511a11942 100644
--- a/backends/btor/btor.cc
+++ b/backends/btor/btor.cc
@@ -129,7 +129,13 @@ struct BtorWorker
void export_cell(Cell *cell)
{
- log_assert(cell_recursion_guard.count(cell) == 0);
+ if (cell_recursion_guard.count(cell)) {
+ string cell_list;
+ for (auto c : cell_recursion_guard)
+ cell_list += stringf("\n %s", log_id(c));
+ log_error("Found topological loop while processing cell %s. Active cells:%s\n", log_id(cell), cell_list.c_str());
+ }
+
cell_recursion_guard.insert(cell);
btorf_push(log_id(cell));