Crash in combine() with NULL element in list

[covoes]

R crashes when calling combine in a list with NULL as first element. If NULL is in any other position there is no crash (an incompatible type error is thrown).

library(dplyr)
combine(list(NULL,1,2,3))

 *** caught segfault ***
address (nil), cause 'memory not mapped'

Traceback:
 1: .Call("dplyr_combine_all", PACKAGE = "dplyr", data)
 2: combine_all(x)
 3: combine(list(NULL, 1, 2))

> sessionInfo()
R version 3.2.2 (2015-08-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Sabayon/Linux

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] dplyr_0.4.3.9000 setwidth_1.0-4   vimcom_1.2-6    

loaded via a namespace (and not attached):
[1] magrittr_1.5   R6_2.1.1       assertthat_0.1 parallel_3.2.2 DBI_0.3.1     
[6] tools_3.2.2    Rcpp_0.12.2