[PRISM] Nested MultiWriteNode with method calls

Fixes ruby/prism#2247.

Author: peterzhu2118

prism_compile.c

@@ -3177,7 +3177,9 @@ pm_compile_target_node(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR *cons
         //
         //     for i, j in []; end
         //
+        if (state != NULL) state->position--;
         pm_compile_multi_target_node(iseq, node, parents, writes, cleanup, src, scope_node, state);
+        if (state != NULL) state->position++;
         break;
       }
       default:
@@ -3270,6 +3272,9 @@ pm_compile_multi_target_node(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR
     // Now, we need to go back and modify the topn instructions in order to
     // ensure they can correctly retrieve the parent expressions.
     pm_multi_target_state_update(&target_state);
+
+    if (state != NULL) state->stack_size += target_state.stack_size;
+
     return target_state.stack_size;
 }
 

test/ruby/test_compile_prism.rb

@@ -653,6 +653,21 @@ def baz=(c); end
         foo = Foo.new
         _, foo.bar, _, foo.baz = 1
       CODE
+
+      # Test nested writes with method calls
+      assert_prism_eval(<<~RUBY)
+        class Foo
+          attr_accessor :bar
+        end
+
+        a = Foo.new
+
+        (a.bar, a.bar), b = [1], 2
+      RUBY
+      assert_prism_eval(<<~RUBY)
+        h = {}
+        (h[:foo], h[:bar]), a = [1], 2
+      RUBY
     end
 
     ############################################################################