fish-shell/tests/test_cmdsub.err

####################
# Command sub just under the limit should succeed

####################
# Command sub at the limit should fail
fish: Too much data emitted by command substitution so it was discarded

set b (string repeat -n 512 x)
      ^

####################
# Command sub over the limit should fail
fish: Too much data emitted by command substitution so it was discarded

set -l x (string repeat -n $argv x)
         ^
in function 'subme'
	called on standard input
	with parameter list '513'

in command substitution
	called on standard input


####################
# Make sure output from builtins outside of command substitution is not affected

####################
# Same builtin in a command substitution is affected
fish: Too much data emitted by command substitution so it was discarded

echo this will fail (string repeat --max 513 b) to output anything
                    ^