*** caught segfault ***; address 0x5573328516d8, cause 'memory not mapped'

[maxl-amberg]

Hi,

I have built a Shiny app (using the golem framework @ColinFay) and have (so far) deployed it via the shinyapps.io-server making use of GitHub Actions. While the app is working locally, error messages show up from time to time when visiting the webpage on the shinyapps.io-server: "Disconnected from the server: Reload".
For reference, here is the logged messages that I focus on:

2021-07-13T12:24:26.495243+00:00 shinyapps[4159264]: *** caught segfault ***
2021-07-13T12:24:26.495244+00:00 shinyapps[4159264]: address 0x5573328516d8, cause 'memory not mapped'

Followed by a traceback starting with:
2021-07-13T12:24:26.497790+00:00 shinyapps[4159264]: 1: policy %in% input$recycling_option_choice_checkbox
and ending in:

2021-07-13T12:24:56.324135+00:00 shinyapps[4159264]: 91: local({  if (identical(.Platform$OS.type, "unix")) {    whoami <- system("whoami", intern = TRUE)    if (identical(whoami, "root")) {      stop("Attempted to run application as whoami=", whoami,        "; USER=", Sys.getenv("USER"))    }  } ...
2021-07-13T12:24:56.324136+00:00 shinyapps[4159264]: An irrecoverable exception occurred. R is aborting now ...

Please find the full log-file attached.
logs.txt

My first starting points:
Specifically:

1. Referring to policy %in% input$recycling_option_choice_checkbox in particular, my code looks as follows:

df_subset_long <- df_final_long %>% 
          dplyr::filter(
            policy_type == input$carbon_price_choice,
            policy %in% input$recycling_option_choice_checkbox,
            monetary_group_type == input$monetary_group_type_choice,
            soceco_group_type == "Keine",
            outcome_type == input$outcome_type_choice,
            statistics_type == input$statistics_type_choice
          )

This type of subsetting has always worked out but at some point started to fail from time to time (strangly enough, not every time it is initiated by an actionButton).

General starting points:

1. Links like https://groups.google.com/g/shiny-discuss/c/aPaAPQpVkdM/m/ZAxtB2MStd4J and https://stackoverflow.com/questions/67511409/problem-with-directory-when-deploying-app-on-shinyapps indicate that there may be problems with certain packages/dependencies. However, this is in general quite difficult to check since changes that have been made locally would have to be deployed and checked on the shinyapps.io server (again and again). E.g. I do not use the xlsx-package mentioned in the first link (creating a problem related to the rJava packages there).
2. As the app is working locally, I have also found a number of avenues to investigate on
   https://support.rstudio.com/hc/en-us/articles/229848967-Why-does-my-app-work-locally-but-not-on-shinyapps-io-
   However, I have so far not found a solution to the problem described above.

Any help appreciated!
Best,
Maxl