Full_Name: Rich Calaway Version: 2.9.2 OS: Windows Vista Submission from: (NULL) (65.47.30.18)
Consider the following function: myfun <- function(){ print(log(-1)) browser() print("Good-bye!") } In the default case, with options(warn=0), if I call this function and type nothing but standard browser commands (c, n, where, Q) at the browser prompt, the warning produced by log(-1) is shown at the completion of the function, as expected: > myfun() [1] NaN Called from: myfun() Browse[1]> c [1] "Good-bye!" Warning message: In log(-1) : NaNs produced However, if I type any other sort of R expression at the browser prompt, the warning is issued immediately after that expression's output: > myfun() [1] NaN Called from: myfun() Browse[1]> print("hello") [1] "hello" Warning message: In log(-1) : NaNs produced Browse[1]> c [1] "Good-bye!" The warnings should be stored until myfun() returns. This bug has been present at least since 2.7.2, and persists in the current R-devel build. Here's the sessionInfo(): > sessionInfo() R version 2.10.0 Under development (unstable) (2009-09-21 r49780) i386-pc-mingw32 locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel