[OE-core] [PATCH] build.py: fix os.getcwd() exception

[Juro Bystricky]

When trying to obtain the current directory from a directory
that does not exist anymore, an exception is raised.
This patch handles such exception.

[YOCTO #10331]

Signed-off-by: Juro Bystricky <juro.bystricky at intel.com>
---
 bitbake/lib/bb/build.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/bitbake/lib/bb/build.py b/bitbake/lib/bb/build.py
index 2ed0441..249f7d6 100644
--- a/bitbake/lib/bb/build.py
+++ b/bitbake/lib/bb/build.py
@@ -261,9 +261,14 @@ def exec_func(func, d, dirs = None, pythonexception=False):
         else:
             exec_func_shell(func, d, runfile, cwd=adir)
 
-    if oldcwd and os.getcwd() != oldcwd:
+    try:
+        curcwd = os.getcwd()
+    except:
+        curcwd = None
+
+    if oldcwd and curcwd != oldcwd:
         try:
-            bb.warn("Task %s changed cwd to %s" % (func, os.getcwd()))
+            bb.warn("Task %s changed cwd to %s" % (func, curcwd))
             os.chdir(oldcwd)
         except:
             pass
-- 
2.7.4