fast gives bad alloc occasionally

[mattfidler]

── Error ('test-plots-cens.R:57:3'): plot censoring ────────────────────────────
Error: Error: std::bad_alloc
Backtrace:
    ▆
 1. ├─base::suppressMessages(...) at test-plots-cens.R:57:3
 2. │ └─base::withCallingHandlers(...)
 3. ├─nlmixr2est::nlmixr(...)
 4. └─nlmixr2est:::nlmixr2.rxUi(...) at nlmixr2est/R/nlmixr2.R:143:3
 5.   └─nlmixr2est:::nlmixr2Est0(.env) at nlmixr2est/R/nlmixr2.R:302:3
── Error ('test-plots-multiple-endpoints.R:57:3'): multiple endpoint plots ─────
Error: Error: std::bad_alloc
Backtrace:
    ▆
 1. ├─base::suppressMessages(...) at test-plots-multiple-endpoints.R:57:3
 2. │ └─base::withCallingHandlers(...)
 3. ├─nlmixr2est::nlmixr(...)
 4. └─nlmixr2est:::nlmixr2.function(...) at nlmixr2est/R/nlmixr2.R:143:3
 5.   └─nlmixr2est:::nlmixr2Est0(.env) at nlmixr2est/R/nlmixr2.R:223:3
── Error ('test-plots.R:100:3'): test plots with vdiffr ────────────────────────
Error in `qs::qserialize(ui, preset = "fast")`: std::bad_alloc