ASAN: "ls -l, " AddressSanitizer warning: "unexpected format specifier in printf interceptor: %j'"

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From: Mark Millard <marklmi_at_yahoo.com>
Date: Sat, 15 Jan 2022 01:28:52 UTC

# ls -l, *
/usr/main-src/lib/libc/stdio/fread.c:133:10: runtime error: applying zero offset to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/main-src/lib/libc/stdio/fread.c:133:10 in 
==47404==AddressSanitizer: WARNING: unexpected format specifier in printf interceptor: %*j' (reported once per process)
-rwxr-xr-x  1 root  wheel    4287752 Jan 14 14:14 a.out
-rw-r--r--  1 root  wheel        281 Jul  2  2021 bt.c
-rw-r--r--  1 root  wheel     580662 Jan 15 01:10 kyua-test-run2.txt
-rw-r--r--  1 root  wheel       2128 Apr 22  2021 listen_sock_peercred.c
-rw-r--r--  1 root  wheel        149 Jan 14 14:14 sigaltstack_get.c
-rw-r--r--  1 root  wheel         50 Jul 16  2021 trivial.cpp

Unfortunately, running under lldb did not stop for the "unexpected format
specifier in printf interceptor" notice, so I do not have a backtrace for
this.

===
Mark Millard
marklmi at yahoo.com