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  1. Apache Arrow
  2. ARROW-7416

[R][Nightly] Fix macos-r-autobrew build on R 3.6.2

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      The nightly build started failing when R 3.6.2 came out. I’ve done some digging and debugging.

      Here is the install log from the failure on 3.6.2: https://dl.bintray.com/ursalabs/arrow-r/logs/bin/macosx/el-capitan/contrib/3.6/20191216-00install.out

      Here is the log from success on 3.6.0: https://dl.bintray.com/ursalabs/arrow-r/logs/bin/macosx/el-capitan/contrib/3.6/20191217-00install.out

      On 3.6.2, there’s a longer temp dir path, with “working_dir” in it. I traced that to this change: https://github.com/wch/r-source/commit/956ea7f7d4db25ad6a2fb32f177e9ec5995d350d
      When it fails, there’s a bunch of “Note: The post-install step did not complete successfully” messages, and then later “Error: too long unix socket path (123bytes given but 104bytes max)“. Which makes me think that the extra `/Rtmpyp98FZ/working_dir/` temp path is pushing us over some limit?

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              npr Neal Richardson
              npr Neal Richardson
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