The following example involves a function whose on.exit() expression both generates an error and catches the error. The body of the function also generates an error.
When calling the function wrapped in a tryCatch, should that tryCatch's error function be given the error from the body of the function, since the one from the on.exit has already been dealt with? Currently the outer tryCatch gets the error from the on.exit expression. xx <- function() { on.exit(tryCatch( expr = stop("error in xx's on.exit"), error=function(e) { cat("xx's on.exit caught error: <<", conditionMessage(e), ">>\n", sep="") })) stop("error in body of xx") } zz <- tryCatch(xx(), error=function(e)paste("outer tryCatch caught error <<", conditionMessage(e), ">>", sep="")) #xx's on.exit caught error: <<error in xx's on.exit>> zz #[1] "outer tryCatch caught error <<error in xx's on.exit>>" Bill Dunlap TIBCO Software wdunlap tibco.com [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel