bitbake: lib/bb/utils: fix error in edit_metadata() when deleting first line

If you tried to delete the variable on the first line passed to
edit_metadata() this failed because the logic for trimming extra blank
lines didn't expect the list to be empty at that point - fix that bad
assumption.

(Bitbake master rev: 8bce6fefdc5c046b916588962a2b429c0f648133)

(Bitbake rev: 3fbf3f8211183ecb18938f2fc9acaa400766d9f0)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/bb/utils.py b/bitbake/lib/bb/utils.py
index 7f82687ae4..9b28952231 100644
--- a/bitbake/lib/bb/utils.py
+++ b/bitbake/lib/bb/utils.py
@@ -1177,7 +1177,7 @@ def edit_metadata(meta_lines, variables, varfunc, match_overrides=False):
             if not skip:
                 if checkspc:
                     checkspc = False
-                    if newlines[-1] == '\n' and line == '\n':
+                    if newlines and newlines[-1] == '\n' and line == '\n':
                         # Squash blank line if there are two consecutive blanks after a removal
                         continue
                 newlines.append(line)