Allow calling a private method with `self.`

This makes it consistent with calling private attribute assignment
methods, which currently is allowed (e.g. `self.value =`).

Calling a private method in this way can be useful when trying to
assign the return value to a local variable with the same name.

[Feature #11297] [Feature #16123]

1 files changed, 4 insertions, 0 deletions

diff --git a/compile.c b/compile.c
index 7cfda23f18..cea09c8f8a 100644
--- a/compile.c
+++ b/compile.c
@@ -6773,6 +6773,10 @@ compile_call(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *const node, in
             iseq_block_param_id_p(iseq, node->nd_recv->nd_vid, &idx, &level)) {
             ADD_INSN2(recv, nd_line(node->nd_recv), getblockparamproxy, INT2FIX(idx + VM_ENV_DATA_SIZE - 1), INT2FIX(level));
         }
+        else if (private_recv_p(node)) {
+            ADD_INSN(recv, nd_line(node), putself);
+            flag |= VM_CALL_FCALL;
+        }
         else {
             CHECK(COMPILE(recv, "recv", node->nd_recv));
         }