Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/cl-regex-1/speedtest.c

FINAL RESULTS:

data/cl-regex-1/speedtest.c:19:5:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
    char error[256];
data/cl-regex-1/speedtest.c:27:13:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
  candlen = strlen(candstr);

ANALYSIS SUMMARY:

Hits = 2
Lines analyzed = 86 in approximately 0.02 seconds (4813 lines/second)
Physical Source Lines of Code (SLOC) = 68
Hits@level = [0]   9 [1]   1 [2]   1 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  11 [1+]   2 [2+]   1 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 161.765 [1+] 29.4118 [2+] 14.7059 [3+]   0 [4+]   0 [5+]   0
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.