One error in tests on PowerPC: test-serializeJSON-S4.R

[barracuda156]

@jeroen If you have a minute, could you please take a look? Everything passes but one test:

R version 4.2.2 (2022-10-31) -- "Innocent and Trusting"
Copyright (C) 2022 The R Foundation for Statistical Computing
Platform: powerpc-apple-darwin10.8.0 (32-bit)

> #This file runs all unit tests on every R CMD check.
> #Comment this out to disable.
> 
> library(testthat)
> 
> #filter is to disable tests that rely on external servers
> test_check("jsonlite", filter="toJSON|fromJSON|libjson|serializeJSON")
Loading required package: jsonlite
[ FAIL 1 | WARN 0 | SKIP 1 | PASS 1501 ]

══ Skipped tests ═══════════════════════════════════════════════════════════════
• sf cannot be loaded (1)

══ Failed tests ════════════════════════════════════════════════════════════════
── Failure ('test-serializeJSON-S4.R:62'): Serializing S4 extending SEXPTYPE ───
`complex1` not identical to `c2`.
Objects equal but not identical
Backtrace:
    ▆
 1. └─base::lapply(...) at test-serializeJSON-S4.R:62:2
 2.   └─jsonlite (local) FUN(X[[i]], ...)
 3.     └─testthat::expect_identical(complex1, c2) at test-serializeJSON-S4.R:67:4

[ FAIL 1 | WARN 0 | SKIP 1 | PASS 1501 ]
Error: Test failures
Execution halted

Thanks in any case.