improve for-each-ref test script

diff --git a/builtin-commit.c b/builtin-commit.c
index 0a70808280c5366acd5655caf0b081b42e628bb4..e3ad38b3bd78bc2d19c5e5d1ebfbe0388b22582e 100644 (file)
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -503,7 +503,8 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
        fp = fopen(git_path(commit_editmsg), "w");
        if (fp == NULL)
-               die("could not open %s", git_path(commit_editmsg));
+               die("could not open %s: %s",
+                   git_path(commit_editmsg), strerror(errno));
 
        if (cleanup_mode != CLEANUP_NONE)
                stripspace(&sb, 0);