os/exec: document ExtraFiles is not supported on windows

Fixes #26182

Change-Id: I1181e191f4742f166c9b67a6f41332a237cf0ede
Reviewed-on: https://go-review.googlesource.com/123855
Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/src/os/exec/exec.go b/src/os/exec/exec.go
index 41fbf963708cb26572472692b8f755a0bd380e0e..88b0a916992ede67a2222262f800c63ad0eab361 100644 (file)
--- a/src/os/exec/exec.go
+++ b/src/os/exec/exec.go
@@ -113,6 +113,8 @@ type Cmd struct {
        // ExtraFiles specifies additional open files to be inherited by the
        // new process. It does not include standard input, standard output, or
        // standard error. If non-nil, entry i becomes file descriptor 3+i.
+       //
+       // ExtraFiles is not supported on Windows.
        ExtraFiles []*os.File
 
        // SysProcAttr holds optional, operating system-specific attributes.