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-rw-r--r--kernel/timinginfo.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/timinginfo.h b/kernel/timinginfo.h
index d818e580b..eba3386d6 100644
--- a/kernel/timinginfo.h
+++ b/kernel/timinginfo.h
@@ -88,10 +88,10 @@ struct TimingInfo
auto src = cell->getPort(ID::SRC);
auto dst = cell->getPort(ID::DST);
for (const auto &c : src.chunks())
- if (!c.wire->port_input)
+ if (!c.wire || !c.wire->port_input)
log_error("Module '%s' contains specify cell '%s' where SRC '%s' is not a module input.\n", log_id(module), log_id(cell), log_signal(src));
for (const auto &c : dst.chunks())
- if (!c.wire->port_output)
+ if (!c.wire || !c.wire->port_output)
log_error("Module '%s' contains specify cell '%s' where DST '%s' is not a module output.\n", log_id(module), log_id(cell), log_signal(dst));
int rise_max = cell->getParam(ID::T_RISE_MAX).as_int();
int fall_max = cell->getParam(ID::T_FALL_MAX).as_int();