R version 4.5.0 RC (2025-04-03 r88103 ucrt) -- "How About a Twenty-Six"
Copyright (C) 2025 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(RJSONIO)
> con = textConnection("[1, 2, 3,\n4]"); fromJSON(con)
[1] 1 2 3 4
> 
> try({con = textConnection("[1, 2, 3,]"); fromJSON(con)})
[[1]]
[1] 1

[[2]]
[1] 2

[[3]]
[1] 3

[[4]]
NULL

> 
> 
> proc.time()
   user  system elapsed 
   0.12    0.06    0.17