git - error when git-diff get pipe args

$ cat a 111 fdsf 333 $ cat b 111 222 333 $ git diff a b # OK diff --git a/a b/b index 768560b..641d574 100644 --- a/a +++ b/b @@ -1,3 +1,3 @@ 111 -fdsf +222 333 $ git diff <(cat a) <(cat b) # ERROR: no result print out diff --git a/dev/fd/63 b/dev/fd/62 index 311e262..554e9f4 120000 --- a/dev/fd/63 +++ b/dev/fd/62 @@ -1 +1 @@ -pipe:[729963] \ No newline at end

[bata64]

process substitution使ったgit diffの結果が変なのは、「git diff compares symlinks」だから、らしい。そうなのかー。

[kk_Ataka]

diffではプロセス置換使えるのにgit diffでは使えないんだけどなんで？→diffと違うから？