What could cause the following behavior? Unfortunately, I can’t share the code. But all of a sudden, I’m unable to successfully run `brms`

on the same examples I used to be able to.

I have:

```
R version 4.0.3 (2020-10-10) -- "Bunny-Wunnies Freak Out"
Copyright (C) 2020 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)
```

And below is the run log. I try to fit a model twice, and they seem to run fine. The problem seems to occur afterward.

```
Loading required package: StanHeaders
Loading required package: ggplot2
rstan (Version 2.21.2, GitRev: 2e1f913d3ca3)
For execution on a local, multicore CPU with excess RAM we recommend calling
options(mc.cores = parallel::detectCores()).
To avoid recompilation of unchanged Stan programs, we recommend calling
rstan_options(auto_write = TRUE)
Do not specify '-march=native' in 'LOCAL_CPPFLAGS' or a Makevars file
Loading required package: Rcpp
Loading 'brms' package (version 2.14.4). Useful instructions
can be found by typing help('brms'). A more detailed introduction
to the package is available through vignette('brms_overview').
Attaching package: 'brms'
The following object is masked from 'package:rstan':
loo
The following object is masked from 'package:stats':
ar
Loading required package: usethis
Compiling Stan program...
Warning message:
In system(paste(cmd, "-n")) : 'make' not found
Start sampling
starting worker pid=11432 on localhost:11102 at 11:23:20.635
starting worker pid=9212 on localhost:11102 at 11:23:21.047
starting worker pid=14828 on localhost:11102 at 11:23:21.500
starting worker pid=13952 on localhost:11102 at 11:23:21.955
SAMPLING FOR MODEL '27306ff5df2e1c257221e6aa1f6284d4' NOW (CHAIN 1).
Chain 1:
Chain 1: Gradient evaluation took 0 seconds
Chain 1: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 1: Adjust your expectations accordingly!
Chain 1:
Chain 1:
Chain 1: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 1: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 1: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 1: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 1: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 1: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 1: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 1: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 1: Iteration: 2800 / 4000 [ 70%] (Sampling)
SAMPLING FOR MODEL '27306ff5df2e1c257221e6aa1f6284d4' NOW (CHAIN 2).
Chain 2:
Chain 2: Gradient evaluation took 0 seconds
Chain 2: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 2: Adjust your expectations accordingly!
Chain 2:
Chain 2:
Chain 1: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 2: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 1: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 2: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 1: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 1:
Chain 1: Elapsed Time: 0.172 seconds (Warm-up)
Chain 1: 0.151 seconds (Sampling)
Chain 1: 0.323 seconds (Total)
Chain 1:
Chain 2: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 2: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 2: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 2: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 2: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 2: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 2: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 2: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 2: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 2: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 2:
Chain 2: Elapsed Time: 0.184 seconds (Warm-up)
Chain 2: 0.164 seconds (Sampling)
Chain 2: 0.348 seconds (Total)
Chain 2:
SAMPLING FOR MODEL '27306ff5df2e1c257221e6aa1f6284d4' NOW (CHAIN 3).
Chain 3:
Chain 3: Gradient evaluation took 0 seconds
Chain 3: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 3: Adjust your expectations accordingly!
Chain 3:
Chain 3:
Chain 3: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 3: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 3: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 3: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 3: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 3: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 3: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 3: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 3: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 3: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 3: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 3: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 3:
Chain 3: Elapsed Time: 0.157 seconds (Warm-up)
Chain 3: 0.144 seconds (Sampling)
Chain 3: 0.301 seconds (Total)
Chain 3:
SAMPLING FOR MODEL '27306ff5df2e1c257221e6aa1f6284d4' NOW (CHAIN 4).
Chain 4:
Chain 4: Gradient evaluation took 0 seconds
Chain 4: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 4: Adjust your expectations accordingly!
Chain 4:
Chain 4:
Chain 4: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 4: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 4: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 4: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 4: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 4: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 4: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 4: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 4: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 4: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 4: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 4: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 4:
Chain 4: Elapsed Time: 0.157 seconds (Warm-up)
Chain 4: 0.156 seconds (Sampling)
Chain 4: 0.313 seconds (Total)
Chain 4:
Compiling Stan program...
Warning message:
In system(paste(cmd, "-n")) : 'make' not found
Start sampling
starting worker pid=1656 on localhost:11102 at 11:24:06.261
starting worker pid=10868 on localhost:11102 at 11:24:06.685
starting worker pid=15252 on localhost:11102 at 11:24:07.062
starting worker pid=15980 on localhost:11102 at 11:24:07.468
SAMPLING FOR MODEL '5705fb2064205c5f40a89a50756107f7' NOW (CHAIN 1).
Chain 1:
Chain 1: Gradient evaluation took 0 seconds
Chain 1: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 1: Adjust your expectations accordingly!
Chain 1:
Chain 1:
Chain 1: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 1: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 1: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 1: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 1: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 1: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 1: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 1: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 1: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 1: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 1: Iteration: 3600 / 4000 [ 90%] (Sampling)
SAMPLING FOR MODEL '5705fb2064205c5f40a89a50756107f7' NOW (CHAIN 2).
Chain 2:
Chain 2: Gradient evaluation took 0 seconds
Chain 2: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 2: Adjust your expectations accordingly!
Chain 2:
Chain 2:
Chain 2: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 1: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 1:
Chain 1: Elapsed Time: 0.157 seconds (Warm-up)
Chain 1: 0.14 seconds (Sampling)
Chain 1: 0.297 seconds (Total)
Chain 1:
Chain 2: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 2: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 2: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 2: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 2: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 2: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 2: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 2: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 2: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 2: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 2: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 2:
Chain 2: Elapsed Time: 0.17 seconds (Warm-up)
Chain 2: 0.156 seconds (Sampling)
Chain 2: 0.326 seconds (Total)
Chain 2:
SAMPLING FOR MODEL '5705fb2064205c5f40a89a50756107f7' NOW (CHAIN 3).
Chain 3:
Chain 3: Gradient evaluation took 0 seconds
Chain 3: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 3: Adjust your expectations accordingly!
Chain 3:
Chain 3:
Chain 3: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 3: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 3: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 3: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 3: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 3: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 3: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 3: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 3: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 3: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 3: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 3: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 3:
Chain 3: Elapsed Time: 0.143 seconds (Warm-up)
Chain 3: 0.15 seconds (Sampling)
Chain 3: 0.293 seconds (Total)
Chain 3:
SAMPLING FOR MODEL '5705fb2064205c5f40a89a50756107f7' NOW (CHAIN 4).
Chain 4:
Chain 4: Gradient evaluation took 0 seconds
Chain 4: 1000 transitions using 10 leapfrog steps per transition would take 0 seconds.
Chain 4: Adjust your expectations accordingly!
Chain 4:
Chain 4:
Chain 4: Iteration: 1 / 4000 [ 0%] (Warmup)
Chain 4: Iteration: 400 / 4000 [ 10%] (Warmup)
Chain 4: Iteration: 800 / 4000 [ 20%] (Warmup)
Chain 4: Iteration: 1200 / 4000 [ 30%] (Warmup)
Chain 4: Iteration: 1600 / 4000 [ 40%] (Warmup)
Chain 4: Iteration: 2000 / 4000 [ 50%] (Warmup)
Chain 4: Iteration: 2001 / 4000 [ 50%] (Sampling)
Chain 4: Iteration: 2400 / 4000 [ 60%] (Sampling)
Chain 4: Iteration: 2800 / 4000 [ 70%] (Sampling)
Chain 4: Iteration: 3200 / 4000 [ 80%] (Sampling)
Chain 4: Iteration: 3600 / 4000 [ 90%] (Sampling)
Chain 4: Iteration: 4000 / 4000 [100%] (Sampling)
Chain 4:
Chain 4: Elapsed Time: 0.196 seconds (Warm-up)
Chain 4: 0.165 seconds (Sampling)
Chain 4: 0.361 seconds (Total)
Chain 4:
Loading required package: survival
Attaching package: 'survival'
The following object is masked from 'package:brms':
kidney
==== C stack trace ===============================
(No symbol) [0x0x472f730]
R_RunWeakRefFinalizer [0x0xc7f326f+383]
R_RunWeakRefFinalizer [0x0xc7f3507+1047]
R_initAssignSymbols [0x0xc7b67a9+72761]
Rf_eval [0x0xc7bb841+369]
R_cmpfun1 [0x0xc7bd547+1191]
Rf_applyClosure [0x0xc7be7aa+442]
R_has_methods_attached [0x0xc7fa088+920]
R_has_methods_attached [0x0xc7fa5d4+2276]
R_initAssignSymbols [0x0xc7a504f+1247]
R_initAssignSymbols [0x0xc7b2cee+57726]
Rf_eval [0x0xc7bb841+369]
R_cmpfun1 [0x0xc7bd547+1191]
Rf_applyClosure [0x0xc7be7aa+442]
R_initAssignSymbols [0x0xc7b2994+56868]
R_forceAndCall [0x0xc7c3896+10726]
R_forceAndCall [0x0xc7c3eb6+12294]
Rf_eval [0x0xc7bbc25+1365]
Rf_ReplIteration [0x0xc7e4c61+673]
Rf_ReplIteration [0x0xc7e4fc1+1537]
run_Rmainloop [0x0xc7e505d+77]
(No symbol) [0x0x4016da]
(No symbol) [0x0x4038bf]
(No symbol) [0x0x4013c5]
(No symbol) [0x0x40152b]
BaseThreadInitThunk [0x0x7ffa1b327974+20]
RtlUserThreadStart [0x0x7ffa1c9fa271+33]
```