Hi,

I still have this problem with the new version of VariantAnnotation (1.20.3).

> fl <- system.file("extdata", "chr22.vcf.gz", package="VariantAnnotation")
> vcf <- readVcf(fl, genome="hg19")

Error in c(DataFrameList(META = meta), tbls[unique(tags)]) : 
  could not find symbol "recursive" in environment of the generic function

> sessionInfo()
R version 3.4.2 (2017-09-28)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.3 LTS

Matrix products: default
BLAS: /usr/lib/atlas-base/atlas/libblas.so.3.0
LAPACK: /usr/lib/atlas-base/atlas/liblapack.so.3.0

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

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

other attached packages:
 [1] VariantAnnotation_1.20.3   SummarizedExperiment_1.4.0 Rsamtools_1.26.2          
 [4] Biostrings_2.42.1          XVector_0.14.1             GenomicRanges_1.26.4      
 [7] GenomeInfoDb_1.10.3        proxysnps_0.0.1            BiocInstaller_1.24.0      
[10] kinship2_1.6.4             quadprog_1.5-5             Matrix_1.2-11             
[13] lattice_0.20-35            xtable_1.8-2               bindrcpp_0.2              
[16] DT_0.2                     purrr_0.2.4                fmsb_0.6.1                
[19] tidyr_0.7.2                biomaRt_2.30.0             IRanges_2.8.2             
[22] S4Vectors_0.12.2           Biobase_2.34.0             BiocGenerics_0.20.0       
[25] limma_3.30.13              dplyr_0.7.4                ggplot2_2.2.1             
[28] knitr_1.17                

loaded via a namespace (and not attached):
 [1] httr_1.3.1               bit64_0.9-7              jsonlite_1.5             Formula_1.2-1           
 [5] assertthat_0.2.0         latticeExtra_0.6-28      blob_1.1.0               BSgenome_1.42.0         
 [9] yaml_2.1.14              RSQLite_2.0              glue_1.1.1               digest_0.6.9            
[13] RColorBrewer_1.1-2       colorspace_1.2-4         htmltools_0.3.6          plyr_1.8.3              
[17] XML_3.98-1.3             pkgconfig_2.0.1          devtools_1.13.4          myvariant_1.4.0         
[21] zlibbioc_1.20.0          scales_0.5.0             BiocParallel_1.8.2       git2r_0.19.0            
[25] tibble_1.3.4             withr_2.1.0              GenomicFeatures_1.26.4   nnet_7.3-12             
[29] lazyeval_0.2.0           survival_2.41-3          magrittr_1.5             memoise_1.1.0           
[33] foreign_0.8-69           tools_3.4.2              munsell_0.4.3            cluster_2.0.6           
[37] AnnotationDbi_1.36.2     compiler_3.4.2           rlang_0.1.2              grid_3.4.2              
[41] RCurl_1.95-4.7           htmlwidgets_0.9          bitops_1.0-6             gtable_0.2.0            
[45] DBI_0.7                  curl_3.0                 R6_2.2.2                 GenomicAlignments_1.10.1
[49] gridExtra_2.0.0          rtracklayer_1.34.2       bit_1.1-12               bindr_0.1               
[53] Hmisc_3.17-1             Rcpp_0.12.13             rpart_4.1-11             acepack_1.3-3.3