Sync with 2.21.4

* maint-2.21:
  Git 2.21.4
  Git 2.20.5
  Git 2.19.6
  Git 2.18.5
  Git 2.17.6
  unpack_trees(): start with a fresh lstat cache
  run-command: invalidate lstat cache after a command finished
  checkout: fix bug that makes checkout follow symlinks in leading path

1 files changed, 8 insertions, 1 deletions

diff --git a/run-command.c b/run-command.c
index 3449db319b..b05ff61b11 100644
--- a/run-command.c
+++ b/run-command.c
@@ -989,6 +989,7 @@ int finish_command(struct child_process *cmd)
 	int ret = wait_or_whine(cmd->pid, cmd->argv[0], 0);
 	trace2_child_exit(cmd, ret);
 	child_process_clear(cmd);
+	invalidate_lstat_cache();
 	return ret;
 }
 
@@ -1289,13 +1290,19 @@ error:
 int finish_async(struct async *async)
 {
 #ifdef NO_PTHREADS
-	return wait_or_whine(async->pid, "child process", 0);
+	int ret = wait_or_whine(async->pid, "child process", 0);
+
+	invalidate_lstat_cache();
+
+	return ret;
 #else
 	void *ret = (void *)(intptr_t)(-1);
 
 	if (pthread_join(async->tid, &ret))
 		error("pthread_join failed");
+	invalidate_lstat_cache();
 	return (int)(intptr_t)ret;
+
 #endif
 }