Error(s) in re-building vignettes:
  ...
--- re-building 'surface_tutorial.Rnw' using Sweave
Loading required package: ape
Loading required package: ouch
Loading required package: subplex
Loading required package: MASS
Loading required package: geiger
 ----------- FAILURE REPORT -------------- 
 --- failure: the condition has length > 1 ---
 --- srcref --- 
: 
 --- package (from environment) --- 
surface
 --- call from context --- 
surfaceSummary(fwd)
 --- call from argument --- 
if (class(lnls) != "matrix") lnls <- matrix(lnls, nrow = 1, dimnames = list(names(lnls)[1], 
    NULL))
 --- R stacktrace ---
where 1: surfaceSummary(fwd)
where 2: eval(expr, .GlobalEnv)
where 3: eval(expr, .GlobalEnv)
where 4: withVisible(eval(expr, .GlobalEnv))
where 5: doTryCatch(return(expr), name, parentenv, handler)
where 6: tryCatchOne(expr, names, parentenv, handlers[[1L]])
where 7: tryCatchList(expr, classes, parentenv, handlers)
where 8: tryCatch(expr, error = function(e) {
    call <- conditionCall(e)
    if (!is.null(call)) {
        if (identical(call[[1L]], quote(doTryCatch))) 
            call <- sys.call(-4L)
        dcall <- deparse(call)[1L]
        prefix <- paste("Error in", dcall, ": ")
        LONG <- 75L
        sm <- strsplit(conditionMessage(e), "\n")[[1L]]
        w <- 14L + nchar(dcall, type = "w") + nchar(sm[1L], type = "w")
        if (is.na(w)) 
            w <- 14L + nchar(dcall, type = "b") + nchar(sm[1L], 
                type = "b")
        if (w > LONG) 
            prefix <- paste0(prefix, "\n  ")
    }
    else prefix <- "Error : "
    msg <- paste0(prefix, conditionMessage(e), "\n")
    .Internal(seterrmessage(msg[1L]))
    if (!silent && isTRUE(getOption("show.error.messages"))) {
        cat(msg, file = outFile)
        .Internal(printDeferredWarnings())
    }
    invisible(structure(msg, class = "try-error", condition = e))
})
where 9: try(withVisible(eval(expr, .GlobalEnv)), silent = TRUE)
where 10: evalFunc(ce, options)
where 11: tryCatchList(expr, classes, parentenv, handlers)
where 12: tryCatch(evalFunc(ce, options), finally = {
    cat("\n")
    sink()
})
where 13: driver$runcode(drobj, chunk, chunkopts)
where 14: utils::Sweave(...)
where 15: engine$weave(file, quiet = quiet, encoding = enc)
where 16: doTryCatch(return(expr), name, parentenv, handler)
where 17: tryCatchOne(expr, names, parentenv, handlers[[1L]])
where 18: tryCatchList(expr, classes, parentenv, handlers)
where 19: tryCatch({
    engine$weave(file, quiet = quiet, encoding = enc)
    setwd(startdir)
    output <- find_vignette_product(name, by = "weave", engine = engine)
    if (!have.makefile && vignette_is_tex(output)) {
        texi2pdf(file = output, clean = FALSE, quiet = quiet)
        output <- find_vignette_product(name, by = "texi2pdf", 
            engine = engine)
    }
    outputs <- c(outputs, output)
}, error = function(e) {
    thisOK <<- FALSE
    fails <<- c(fails, file)
    message(gettextf("Error: processing vignette '%s' failed with diagnostics:\n%s", 
        file, conditionMessage(e)))
})
where 20: tools:::buildVignettes(dir = "/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/surface.Rcheck/vign_test/surface", 
    ser_elibs = "/tmp/RtmpcNK1Ph/file384c4d47ca48.rds")

 --- value of length: 2 type: logical ---
[1] FALSE  TRUE
 --- function from context --- 
function (fwd = NULL, bwd = NULL) 
{
    if (is.null(fwd)) 
        obj <- bwd
    if (is.null(bwd)) 
        obj <- fwd
    if (!is.null(fwd) & !is.null(bwd)) {
        obj <- c(fwd[-length(fwd)], bwd)
    }
    k <- length(obj)
    lnls <- sapply(obj, function(x) {
        sapply(x$fit, function(y) summary(y)$loglik)
    })
    if (class(lnls) != "matrix") 
        lnls <- matrix(lnls, nrow = 1, dimnames = list(names(lnls)[1], 
            NULL))
    aics <- sapply(obj, function(x) x$aic)
    names(aics) <- 1:k
    n_regimes_seq <- sapply(obj, function(x) x$n_regimes)
    obj <- obj[[k]]
    shifts <- obj$savedshifts
    n_regimes <- obj$n_regimes
    obj <- obj$fit
    alpha <- sapply(obj, function(x) summary(x)$alpha)
    phylhalflife <- log(2)/alpha
    sigma_squared <- sapply(obj, function(x) summary(x)$sigma.squared)
    theta <- sapply(obj, function(x) summary(x)$optima[[1]])
    list(n_steps = k, lnls = lnls, n_regimes_seq = n_regimes_seq, 
        aics = aics, shifts = shifts, n_regimes = n_regimes, 
        alpha = alpha, phylhalflife = phylhalflife, sigma_squared = sigma_squared, 
        theta = theta)
}
<bytecode: 0x4053db0>
<environment: namespace:surface>
 --- function search by body ---
Function surfaceSummary in namespace surface has this body.
 ----------- END OF FAILURE REPORT -------------- 

Error: processing vignette 'surface_tutorial.Rnw' failed with diagnostics:
 chunk 4 
Error in if (class(lnls) != "matrix") lnls <- matrix(lnls, nrow = 1, dimnames = list(names(lnls)[1],  : 
  the condition has length > 1

--- failed re-building 'surface_tutorial.Rnw'

SUMMARY: processing the following file failed:
  'surface_tutorial.Rnw'

Error: Vignette re-building failed.
Execution halted