merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 8 insertions, 3 deletions

diff --git a/third_party/git/t/t6018-rev-list-glob.sh b/third_party/git/t/t6018-rev-list-glob.sh
index bb5aeac07f..fe2f3cec3d 100755
--- a/third_party/git/t/t6018-rev-list-glob.sh
+++ b/third_party/git/t/t6018-rev-list-glob.sh
@@ -32,11 +32,11 @@ test_expect_success 'setup' '
 	git checkout -b someref master &&
 	commit some &&
 	git checkout master &&
-	commit master2 &&
+	commit topic_2 &&
 	git tag foo/bar master &&
-	commit master3 &&
+	commit topic_3 &&
 	git update-ref refs/remotes/foo/baz master &&
-	commit master4 &&
+	commit topic_4 &&
 	git update-ref refs/remotes/upstream/one subspace/one &&
 	git update-ref refs/remotes/upstream/two subspace/two &&
 	git update-ref refs/remotes/upstream/x subspace-x &&
@@ -345,6 +345,11 @@ test_expect_success 'rev-list should succeed with empty output with empty glob'
 	test_must_be_empty actual
 '
 
+test_expect_success 'rev-list should succeed with empty output when ignoring missing' '
+	git rev-list --ignore-missing $ZERO_OID >actual &&
+	test_must_be_empty actual
+'
+
 test_expect_success 'shortlog accepts --glob/--tags/--remotes' '
 
 	compare shortlog "subspace/one subspace/two" --branches=subspace &&