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It is because you allocating by 49 elements each time.
There is optimizations in
https://github.com/lua/lua/blob/master/lparser.c#L872 that cause
problem
It won't flush until LFIELDS_PER_FLUSH (defined as 50
https://github.com/lua/lua/blob/master/lopcodes.h#L403 )
So 5 levels by 50 registers gives 250 registers So 6th level will
for sure exceed amount
of free registers
You discover aт antique bug.
Hi,
The nesting depth of the table to be parsed successfully depends on how the nested levels are filled. Here is the code to produce the worst case for the parser:
local depth = 5
local list_size= 49
io.write("return { ")
for i = 1, depth do
for j = 1, list_size do
io.write(i, ", ")
end
io.write("{")
end
for i = depth, 1, -1 do
io.write("}")
end
io.write("}")
For depth = 5 the output is valid code, while for the depth = 6 parser fails. If You will play with list_size values You may obtain much deeper nested tables to be parsed successfully. But the guaranteed depth to be parsed is 5. My patch increases it up to 29.
Родион Горковенко wrote:
> Perhaps, provide a small straightforward example please?