OSS-Fuzz issue 69730 about systemd

[evverx]

hexdump -C clusterfuzz-testcase-minimized-fuzz-varlink-idl-4984893411491840.fuzz 
00000000  23 5c 0a 69 6e 74 65 72  66 61 63 65 2e           |#\.interface.|
0000000d

Assertion 'varlink_idl_format(vi, &dump) >= 0' failed at src/fuzz/fuzz-varlink-idl.c:31, function LLVMFuzzerTestOneInput(). Aborting.
--
  | AddressSanitizer:DEADLYSIGNAL
  | =================================================================
  | ==11890==ERROR: AddressSanitizer: ABRT on unknown address 0x053900002e72 (pc 0x7b7be310200b bp 0x7fff72024670 sp 0x7fff72024420 T0)
  | #0 0x7b7be310200b in raise /build/glibc-SzIz7B/glibc-2.31/sysdeps/unix/sysv/linux/raise.c:51:1
  | #1 0x7b7be30e1858 in abort /build/glibc-SzIz7B/glibc-2.31/stdlib/abort.c:79:7
  | #2 0x7b7be3b496b9 in log_assert_failed systemd/src/basic/log.c:992:9
  | #3 0x5687c7cfdf89 in LLVMFuzzerTestOneInput systemd/src/fuzz/fuzz-varlink-idl.c:31:9
  | #4 0x5687c7d1cd20 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:614:13
  | #5 0x5687c7d074b4 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:327:6
  | #6 0x5687c7d0cf4a in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:862:9
  | #7 0x5687c7d39342 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
  | #8 0x7b7be30e3082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/libc-start.c:308:16
  | #9 0x5687c7c2378d in _start