(MacOS 15 x86_64) Error: running examples in ‘stats-Ex.R’ failed

If you goo further back, you will see FAIL on the same platform for quite a while, but failing in different places. E.g.,

2025-11-05T19:29:34.2882140Z   > coef(fmCc)
2025-11-05T19:29:34.2883410Z   (Intercept)           x         chB         chC         cha         chb         chc         chd 
2025-11-05T19:29:34.2885100Z    12.7781626  19.8494272  -0.8240301  -1.3309157 -31.7032317 -32.8819084 -33.3519985 -34.6249161 
2025-11-05T19:29:34.2886740Z   > ## (Intercept)           x         chB         chC         cha         chb         chc         chd
2025-11-05T19:29:34.2888830Z   > ##  12.7781626  19.8494272  -0.8240301  -1.3309157 -31.7032317 -32.8819084 -33.3519985 -34.6249161
2025-11-05T19:29:34.2891030Z   > (coef(fmCf) -> cf.f) # the same
2025-11-05T19:29:34.2892540Z   (Intercept)           x         chB         chC         cha         chb         chc         chd 
2025-11-05T19:29:34.2894330Z    12.7781626  19.8494272  -0.8240301  -1.3309157 -31.7032317 -32.8819084 -33.3519985 -34.6249161 
2025-11-05T19:29:34.2895830Z   > stopifnot(exprs = {
2025-11-05T19:29:34.2897020Z   +     identical(coef(fmCc), cf.f)
2025-11-05T19:29:34.2898910Z   + })
2025-11-05T19:29:34.2900180Z   Error: identical(coef(fmCc), cf.f) is not TRUE
2025-11-05T19:29:34.2902120Z   Execution halted

I think we have been here before and the culprit was stochasticity in the multithreaded Accelerate framework. Basically the examples do the same thing twice and get different results.

.pd

On 17 Dec 2025, at 11.09, Jeroen Ooms <jeroenooms at gmail.com> wrote:

Checking base R on MacOS 15 fails a test on intel (not arm64), see:
https://contributor.r-project.org/svn-dashboard/

  Error: running examples in ?stats-Ex.R? failed
  ...
  Error: identical(strip(qrI), strip(lmI[c("hat", "sigma")])) is not TRUE

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