devshell.bbclass: Exceptions displayed within devpyshell

If you type something into devpyshell, an exception should be triggered,
but that exception isn't printed out because it is not being flushed out
of the buffer. This patch fixes that issue.

[YOCTO #12156]

(From OE-Core rev: 92b2da5824c11063d0bb8e39bc221530137e29b4)

Signed-off-by: Dorinda Bassey <dorindabassey@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 9f95e82a3b27bfd5177a855326dcad8a5bdf5b2d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/classes/devshell.bbclass b/meta/classes/devshell.bbclass
index fdf7dc100f..76dd0b42ee 100644
--- a/meta/classes/devshell.bbclass
+++ b/meta/classes/devshell.bbclass
@@ -128,6 +128,7 @@ def devpyshell(d):
                     more = i.runsource(source, "<pyshell>")
                     if not more:
                         buf = []
+                    sys.stderr.flush()
                     prompt(more)
             except KeyboardInterrupt:
                 i.write("\nKeyboardInterrupt\n")