[boost] Bug report rejected as conformant

Subject: [boost] Bug report rejected as conformant
From: Edward Diener (eldiener_at_[hidden])
Date: 2018-01-13 18:45:10

I recently reported a preprocessor bug in Oracle C++ 12.6 on their 
online forum when compiling a C program example. I even cited the C11 
standard in showing that Oracle C++ 12.6's actions were non-conformant. 
The answer I was given, from an Oracle C++ developer who said he was a 
member of the C++ standard committee, is that since Oracle C++ 12.6 
gives a warning message rather than a compiler error the compiler was 
compliant with the C standard, since the standard only requires a 
diagnostic message to be considered standard compliant when it does not 
implement the compiler according to the standard, and that a warning was 
a diagnostic message. Furthermore since there was a way to force the 
particular warning to be considered an error, Oracle was not going to 
change their compiler. At that point I "lost it" so to speak.

I cannot conceive that any C/C++ standard would specify that giving a 
warning rather than an error, when not complying with the C/C++ 
standard, would then make the compiler compliant. Comments ?