article : undefined behavior and the purpose of C

[Mayuresh Kathe]

Don't know if this has been discussed here before, but I found the 
following excerpt from the article at 
http://www.yodaiken.com/2018/12/31/undefined-behavior-and-the-purpose-of-c/ 
unnerving;
... often the writers of the ISO C Standard have thrown up their hands 
and labeled the effects of non-portable and potentially non-portable 
operations "undefined behavior" for which they provided only a fuzzy 
guideline.  Unfortunately, the managers of the gcc and clang C compilers 
have increasingly ignored the guideline and ignored well-established 
well-understood practice, producing  often bizarre and dangerous results 
...