diff always reports symlinks as "M"

[chenfengyuan]

rustic version rustic v0.11.3

rm -rf a
(mkdir a;cd a;echo aaa > a.txt;ln -s a.txt b.txt)
rustic backup a
touch a/c.txt
rustic backup a
rustic snapshots
rustic diff 18f2f0f3 10d7d86f

Output of diff:

[INFO] comparing 18f2f0f3: (18f2f0f3) with 10d7d86f: (10d7d86f)
M    "a/b.txt"
+    "a/c.txt"
Files   : 1 =, 1 +, 0 -, 0 M, 0 U
Dirs    : 1 =, 0 +, 0 -, 0 M, 0 U
Symlinks: 0 =, 0 +, 0 -, 1 M, 0 U

The symlink a/b.txt has not been modified, but diff shows it as M (modified).