miniblog.

Bash's list of behaviours that aren't POSIX-compliant is longer than I expected: https://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html I used fish for a while and liked it, but POSIX-ish shells work with everything. These days I use a heavily customised zsh.

Entertaining Stack Overflow discussion (from April 1st) of .png source code input to a C++ compiler: https://stackoverflow.com/questions/5508110/why-is-this-program-erroneously-rejected-by-three-c-compilers I'm slightly horrified that you could accept .png source code and still be a standards compliant compiler!

The GCC wiki has a scary list of all the arithmetic transformations that don't work in compliant floating point C: