Code diagnostics incorrectly flags argument mismatches for functions in a list

RStudio IDE
#1

Using R Studio version 1.1.453

When the "Check arguments to R function calls" option (Tools > Global Options > Code > Diagnostics) is checked, if a function is created in a list and named after another function, diagnostics will use the function in the list to check subsequent calls.

Example code:

a <- list(
  paste = function(x) paste(x, collapse = ""),
  x     = paste(letters, collapse = "")
)

y <- paste(letters, collapse = "")

Diagnostics flags:

rstudio-diagnostics-bug

In this example, each flag says, "too many arguments in call to 'paste'". Of course, the code runs fine.

#2

I've had (and continue to have) the same issue every once in a while when I redefine function in a package, but before I refresh the session. Looks like this is the case here as well. Code diagnostics probably looks at paste definition that takes only 1 element and then freaks out when it sees paste with multiple arguments.

I'm on Version 1.2.1114 RStudio, so looks like it is "consistent".

2 Likes
#3

Thank you for the bug report! I've reproduced this; would you mind filing this as an issue at https://github.com/rstudio/rstudio/issues?

2 Likes
#4

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