check return code of prepare_revision_walk
A failure in prepare_revision_walk can be caused by a not parseable object. Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Junio C Hamano

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@ -215,6 +215,7 @@ void mark_reachable_objects(struct rev_info *revs, int mark_reflog)
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* Set up the revision walk - this will move all commits
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* from the pending list to the commit walking list.
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*/
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prepare_revision_walk(revs);
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if (prepare_revision_walk(revs))
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die("revision walk setup failed");
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walk_commit_list(revs);
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}
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