[R] segfault on calls to arrow::S3FileSystem$create

[asfimport]

I was trying out a colleague's example code today and ended up with a segfault. Their code was:

library(arrow)

minio <- S3FileSystem$create(
  access_key = "",
  secret_key = "",
  scheme = "http",
  endpoint_override = "data.ecoforecast.org"
)

Though I'm able to reproduce the segfault with a more minimal example like:

library(arrow)
S3FileSystem$create()

The output I get immediately in the R console is:

> S3FileSystem$create()

 *** caught segfault ***
address 0x1a0, cause 'memory not mapped'

Traceback:
 1: (function (anonymous, access_key, secret_key, session_token,     role_arn, session_name, external_id, load_frequency, region,     endpoint_override, scheme, background_writes) {    .Call(`_arrow_fs___S3FileSystem__create`, anonymous, access_key,         secret_key, session_token, role_arn, session_name, external_id,         load_frequency, region, endpoint_override, scheme, background_writes)})(access_key = "", secret_key = "", session_token = "", role_arn = "",     session_name = "", external_id = "", load_frequency = 900L,     region = "", endpoint_override = "", scheme = "", background_writes = TRUE,     anonymous = FALSE)
 2: exec(fs___S3FileSystem__create, !!!args)
 3: S3FileSystem$create()

I've attached detailed info about my environment and a full core dump to the issue but the high level stuff is:

• OS: macOS 12.0.1

• R: 4.1.2

• R arrow version: 6.0.0.2

   

Reporter: Bryce Mecum / @amoeba
Assignee: Jonathan Keane / @jonkeane

Original Issue Attachments:

• R-2021-11-10-124053.txt
• session_info.txt

PRs and other links:

• GitHub Pull Request #11680
• GitHub Pull Request #11697

_{Note: This issue was originally created as ARROW-14667. Please see the migration documentation for further details.}

[asfimport]

Nicola Crane / @thisisnic:
Thanks for reporting this Bryce. Here's the segfault with a little extra from the C++ debugger - will follow up with the C++ devs as I'm not sure what's happening here.

> S3FileSystem$create()

Thread 1 "R" received signal SIGSEGV, Segmentation fault.
0x00007ffff0128369 in std::__atomic_base<long>::operator++ (this=0x178) at /usr/include/c++/9/bits/atomic_base.h:318
318	      operator++() noexcept

[asfimport]

Nicola Crane / @thisisnic:
Further investigation by @jonkeane found this to be an error in the R package's C++ code, where it was trying to use an object which hadn't yet been initialised.  There is now a PR open for this, so @amoeba , this should be fixed in the next nightly build.  Thanks again for catching this!

[asfimport]

Jonathan Keane / @jonkeane:
Issue resolved by pull request 11680
#11680