session             <- browserSession()

I get an error when trying to start a browser session. This has only appeared within the last couple of weeks and I've not been able to get around it. 

The error is below - Infinite recursion.

Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
Error in unique(unlist(lapply(dots, methods:::.class1))) : 
  error in evaluating the argument 'x' in selecting a method for function 'unique': evaluation nested too deeply: infinite recursion / options(expressions=)?
Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?​

Any suggestions? I've tried passing "UCSC" as a parameter, and I get the same error. 

Cheers, 

EDIT - Session Info and walk through

> library(rtracklayer)
Loading required package: GenomicRanges
Loading required package: BiocGenerics
Loading required package: parallel

Attaching package: ‘BiocGenerics’

The following objects are masked from ‘package:parallel’:

    clusterApply, clusterApplyLB, clusterCall, clusterEvalQ, clusterExport, clusterMap, parApply, parCapply, parLapply, parLapplyLB, parRapply, parSapply, parSapplyLB

The following object is masked from ‘package:stats’:

    xtabs

The following objects are masked from ‘package:base’:

    anyDuplicated, append, as.data.frame, as.vector, cbind, colnames, do.call, duplicated, eval, evalq, Filter, Find, get, intersect, is.unsorted, lapply, Map, mapply,
    match, mget, order, paste, pmax, pmax.int, pmin, pmin.int, Position, rank, rbind, Reduce, rep.int, rownames, sapply, setdiff, sort, table, tapply, union, unique,
    unlist, unsplit

Loading required package: S4Vectors
Loading required package: stats4
Loading required package: IRanges
Loading required package: GenomeInfoDb

> sessionInfo()
R version 3.2.0 (2015-04-16)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 14.04.2 LTS

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

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] rtracklayer_1.28.4   GenomicRanges_1.20.4 GenomeInfoDb_1.4.0   IRanges_2.2.3        S4Vectors_0.6.0      BiocGenerics_0.14.0 

loaded via a namespace (and not attached):
 [1] XML_3.98-1.2            Rsamtools_1.20.4        Biostrings_2.36.1       bitops_1.0-6            GenomicAlignments_1.4.1 futile.options_1.0.0    zlibbioc_1.14.0        
 [8] XVector_0.8.0           futile.logger_1.4.1     lambda.r_1.1.7          BiocParallel_1.2.2      tools_3.2.0             RCurl_1.95-4.6   

> session <- browserSession()
Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?
Error in unique(unlist(lapply(dots, methods:::.class1))) : 
  error in evaluating the argument 'x' in selecting a method for function 'unique': evaluation nested too deeply: infinite recursion / options(expressions=)?
Error during wrapup: evaluation nested too deeply: infinite recursion / options(expressions=)?

EDIT2: I uninstalled R, RStudio, deleted all libraries, then reinstalled rtracklayer from scratch. It made no difference and I get the same error. 

EDIT3: Installed things on a fresh Windows installation, on a completely different network, and I'm still getting the same error. I'm pretty stumped now, so I'd appreciate any input from the developers, or anyone that has any suggestions.  

Hi Andrew,

I can't reproduce this:

library(rtracklayer)
session <- browserSession()
session
# A genome browser session of class 'UCSCSession' with 0 views and 178 tracks

Please provide your sessionInfo(). See mine below.

Thanks,

H.

> sessionInfo()
R version 3.2.0 (2015-04-16)
Platform: x86_64-unknown-linux-gnu (64-bit)
Running under: Ubuntu 14.04.2 LTS

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] stats4    parallel  stats     graphics  grDevices utils     datasets 
[8] methods   base     

other attached packages:
[1] rtracklayer_1.28.4   GenomicRanges_1.20.4 GenomeInfoDb_1.4.0  
[4] IRanges_2.3.10       S4Vectors_0.6.0      BiocGenerics_0.14.0 

loaded via a namespace (and not attached):
 [1] XML_3.98-1.2            Rsamtools_1.20.4        Biostrings_2.36.1      
 [4] bitops_1.0-6            GenomicAlignments_1.4.1 futile.options_1.0.0   
 [7] zlibbioc_1.14.0         XVector_0.8.0           futile.logger_1.4.1    
[10] lambda.r_1.1.7          BiocParallel_1.2.2      tools_3.2.0            
[13] RCurl_1.95-4.6