@@ -, +, @@ 
---
 pym/portage/util/_async/PipeLogger.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
--- a/pym/portage/util/_async/PipeLogger.py	
+++ a/pym/portage/util/_async/PipeLogger.py	
@@ -98,9 +98,8 @@ class PipeLogger(AbstractPollTask):
 							stdout_buf = \
 								stdout_buf[os.write(stdout_fd, stdout_buf):]
 						except OSError as e:
-							if e.errno != errno.EAGAIN:
+							if e.errno not in (errno.EAGAIN, errno.EIO):
 								raise
-							del e
 							failures += 1
 							if failures > 50:
 								# Avoid a potentially infinite loop. In
@@ -108,6 +107,12 @@ class PipeLogger(AbstractPollTask):
 								# and it's unlikely to exceed 1.
 								raise
 
+							if e.errno != errno.EAGAIN:
+								# For cases like bug #459674 where we receive
+								# an unexpected EIO error on Linux, simply
+								# retry until our failure limit is reached.
+								continue
+
 							# This means that a subprocess has put an inherited
 							# stdio file descriptor (typically stdin) into
 							# O_NONBLOCK mode. This is not acceptable (see bug
--