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-rw-r--r--src/lib/log/util_bug.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/lib/log/util_bug.c b/src/lib/log/util_bug.c
index e5d5a2958c..b9dc296fc6 100644
--- a/src/lib/log/util_bug.c
+++ b/src/lib/log/util_bug.c
@@ -145,7 +145,8 @@ tor_bug_occurred_(const char *fname, unsigned int line,
log_warn(LD_BUG, "%s:%u: %s: Non-fatal assertion %s failed.%s",
fname, line, func, expr, once_str);
tor_asprintf(&buf, "Non-fatal assertion %s failed in %s at %s:%u%s%s",
- expr, func, fname, line, fmt ? " : " : "", extra);
+ expr, func, fname, line, fmt ? " : " : "",
+ extra ? extra : "");
tor_free(extra);
}
log_backtrace(LOG_WARN, LD_BUG, buf);