parse: Fix crash on -xdev -mount

Author: tavianator

src/parse.c

@@ -1802,7 +1802,7 @@ static struct bfs_expr *parse_mount(struct parser_state *state, int arg1, int ar
 	bfs_warning(state->ctx, "${blu}-xdev${rs}, due to http://austingroupbugs.net/view.php?id=1133.\n\n");
 
 	state->ctx->flags |= BFTW_PRUNE_MOUNTS;
-	state->mount_arg = state->argv;
+	state->mount_arg = expr->argv;
 	return expr;
 }
 

tests/bfs/warn_xdev_mount.out

@@ -0,0 +1,19 @@
+basic
+basic/a
+basic/b
+basic/c
+basic/c/d
+basic/e
+basic/e/f
+basic/g
+basic/g/h
+basic/i
+basic/j
+basic/j/foo
+basic/k
+basic/k/foo
+basic/k/foo/bar
+basic/l
+basic/l/foo
+basic/l/foo/bar
+basic/l/foo/bar/baz

tests/bfs/warn_xdev_mount.sh

@@ -0,0 +1,2 @@
+# Regression test: don't crash if -mount is the last option
+bfs_diff basic -warn -xdev -mount