"Nothing to compact" messages in long running process

[Mkranj]

Related to this issue in Shiny.
In a long-running Shiny app (~week of uptime), the console gets flooded with "Nothing to compact" messages from the compact() function.

If this is behavior as expected, could the messages at least be suppressed in some way?

[wch]

I found a way to reproduce the problem. With the following code, it starts happening after adding and removing 257 items.

m <- cache_mem()
for (i in 1:258) {
  cat("\n", i, " ")
  m$set(as.character(i), i)
  m$remove(as.character(i))
}

#> ...
#> 254
#> 255  
#> 256  
#> 257  nothing to compact
#>
#> 258  nothing to compact