From 48ed6d998bb2943891acd730c4aaef5d1deecb7e Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Tue, 14 Dec 2021 16:27:37 +0000
Subject: Fix null pointer dereference after failing to extract DFF from
memory.
Fixes #3110.
---
kernel/mem.cc | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/mem.cc b/kernel/mem.cc
index 746f667ea..96168ff76 100644
--- a/kernel/mem.cc
+++ b/kernel/mem.cc
@@ -985,7 +985,8 @@ Cell *Mem::extract_rdff(int idx, FfInitVals *initvals) {
c = ff.emit();
}
- log("Extracted %s FF from read port %d of %s.%s: %s\n", trans_use_addr ? "addr" : "data",
+ if (c)
+ log("Extracted %s FF from read port %d of %s.%s: %s\n", trans_use_addr ? "addr" : "data",
idx, log_id(module), log_id(memid), log_id(c));
port.en = State::S1;
--
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