- reltimestr(): Produce negative value by comparing the unsigned
proftime_T value to INT64_MAX.
https://github.com/neovim/neovim/issues/10452#issuecomment-511155132
1. The interfaces of nearly all platforms return uint64_t. INT64_MAX is
only half of that.
2. Low-level interfaces like this typically define that there is no
fixed starting point. The only guarantees are that it's (a)
monotonically increasing at a rate that (b) matches real time.
ref 06af88cd72fix#10452
Hope this will make people using feed_command less likely: this hides bugs.
Already found at least two:
1. msgpackparse() will show internal error: hash_add() in case of duplicate
keys, though it will still work correctly. Currently silenced.
2. ttimeoutlen was spelled incorrectly, resulting in option not being set when
expected. Test was still functioning somehow though. Currently fixed.
It is otherwise impossible to determine which test failed sanitizer/valgrind
check. test/functional/helpers.lua module return was changed so that tests which
do not provide after_each function to get new check will automatically fail.
