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-rw-r--r--kernel/rtlil.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index f237f57e..35cd54b4 100644
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -228,6 +228,7 @@ void RTLIL::Selection::optimize(RTLIL::Design *design)
RTLIL::Design::Design()
{
refcount_modules_ = 0;
+ selection_stack.push_back(RTLIL::Selection());
}
RTLIL::Design::~Design()