-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi folks: I could really use an expert eye on this. I'm trying to get to the bottom of a very tenacious bug in the GHC Builder. The details of how this happens are documented separately for reference: https://gist.github.com/AlainODea/dc841046524cd7833da8 The Handles involved are returned by System.Process.runInteractiveProcess. They are non-blocking at the Illumos kernel level. It appears that maybeFillReadBuffer (called by hGetLine under the hood) treats EAGAIN as an error: http://hackage.haskell.org/package/base-4.7.0.0/docs/src/GHC-IO-Handle-Text.... Is it expected that runInteractiveProcess would return non-blocking Handles for stdout and stderr? Is it an error to call hGetLine on a non-blocking Handle? Thanks, Alain -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTaG1jAAoJEP0rIXJNjNSAxpwH/immeV301FEZx9o6Q0ODCuqK AUBnDHcjS9VBqhJ7XnuwkWXi83qNJhoi9P4RjamL3EGnScHVfa1mnpkX5T1IWCb4 S4lWxICbVH4tmFYOwHmElzi8vzBvgmsCueiU5uMJc66dteR4U2e9FHb9Vaurg222 dDwfIYu7mIEb/Fld4dqN+qFp9ZbVPxjBASVPlIDpZFY95+0hMq/s331B5T6zi/ZZ o63pYR2xkIScIlocEYaYJT67OssYxHScu6F/dOu4F4dllV013cP0x6/6ov4KCpBi fqM5WRid1UyTtCco2dXg7eRkzQxEMoVL0TpEQbDn/iWKJS99+rG3YSt5JYDbhTY= =xtDH -----END PGP SIGNATURE-----