[C++] segfault when writing CSV from RecordBatchReader

[asfimport]

I'm currently trying to implement functionality in R so that we can open a dataset and then write to a CSV file, but I'm getting a segfault when I run my tests:

 

tbl <- tibble::tibble(
  dbl = c(1:8, NA, 10) + .1,
  lgl = sample(c(TRUE, FALSE, NA), 10, replace = TRUE),
  false = logical(10),
  chr = letters[c(1:5, NA, 7:10)]
)

make_temp_dir <- function() {
  path <- tempfile()
  dir.create(path)
  normalizePath(path, winslash = "/")
}

data_dir <- make_temp_dir()
write_dataset(tbl, data_dir, partitioning = "lgl")
data_in <- open_dataset(data_dir)

csv_file <- tempfile()
tbl_out <- write_csv_arrow(data_in, csv_file)

 

Thread 1 "R" received signal SIGSEGV, Segmentation fault.
0x00007fffee51fdd7 in __gnu_cxx::__exchange_and_add (__mem=0xe9, __val=-1)
    at /usr/include/c++/9/ext/atomicity.h:49
49	  { return __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }

Reporter: Nicola Crane / @thisisnic
Assignee: Ákos Hadnagy / @ahadnagy

Related issues:

• [R] Enable write_csv_arrow to take Dataset or arrow_dplyr_query as input (blocks)

_{Note: This issue was originally created as ARROW-15128. Please see the migration documentation for further details.}

[asfimport]

Nicola Crane / @thisisnic:
@ahadnagy Just wanted to check if this looks obvious to you what's happening here, as I know you implemented the original code that implemented the C++ capabilities here? Thank you! :)

[asfimport]

Ákos Hadnagy / @ahadnagy:
Hmm, not as of yet. :( I'll try to reproduce it in C++. Thanks for letting me know!

[asfimport]

Nicola Crane / @thisisnic:
Was doing the wrong thing here, this works fine