Renames `tv` function argument to `top_tv` and `cur_tv` variable to `tv`, so
`tv` will mean something more or less the same in both
_TYPVAL_ENCODE_CONVERT_ONE_VALUE and _TYPVAL_ENCODE_ENCODE functions.
Occurs when trying to dump a partial with attached self dictionary which
references that partial. “Infinite” loop should normally result in Neovim killed
by OOM killer.
Also moved the place when partials are unreferenced by clear_tv: from
…FUNC_START to …FUNC_END.
This makes gdb backtraces much more meaningful: specifically I now know at which
line it crashes in place of seeing that it crashes at
TYPVAL_ENCODE_DEFINE_CONV_FUNCTIONS macros invocation.
In order to not conflict with new error codes that Vim adds, all Neovim
error codes should be above 5000. The three existing sub-5000 error
codes (E926, E951, and E952) are now E50003, E5004, and E5005
respectively.
E953 was removed in 6167ce6df2, so just
remove it from the help.
This ought to prevent stack overflow, but I do not see this actually working:
*lua* code crashes with stack overflow when trying to deserialize msgpack from
Neovim, Neovim is fine even if nesting level is increased 100x (though test
becomes very slow); not sure how recursive function may survive this. So it
looks like there are currently only two positive effects:
1. NULL lists are returned as empty (#4596).
2. Functional tests are slightly more fast. Very slightly. Checked for Release
build for test/functional/eval tests because benchmarking of debug mode is
not very useful.
For string() it looks like no optimization, sometimes performance is even worse.
Since it was designed to avoid heap allocations in clear_tv let’s see whether it
will make any difference once clear_tv uses typval_encode to avoid stack
overflow in the disabled test.
Adds two undocumented v: variables: _null_list and _null_dict because I do not
know a reproducible way to get such lists (though I think I heard about this)
and dictionaries (do not remember hearing about them). NULL strings are obtained
using $XXX_UNEXISTENT_VAR_XXX.
Fixes crash in json_encode($XXX_UNEXISTENT_VAR_XXX). Other added tests worked
fine before this commit.
