> Making more things UB is a hint that they're absolutely fine with the idea that some things are undefined in Standard C, but fully defined in POSIX C. Have they actually talked to POSIX guys about ...

> Classifying a call to realloc with a size of 0 as undefined behavior would allow POSIX to define the otherwise undefined behavior however they please. and POSIX does define it already: So if you ...

A variable (structure that holds data) that is not available at runtime to the application. This typically occurs with programming languages such as scripts, which allow variables to be located at ...