Assign temporary ID to anonymous ID [Bug #18250]

Dumped iseq binary can not have unnamed symbols/IDs, and ID 0 is
stored instead.  As `struct rb_id_table` disallows ID 0, also for
the distinction, re-assign a new temporary ID based on the local
variable table index when loading from the binary, as well as the
parser.

1 files changed, 1 insertions, 0 deletions

diff --git a/compile.c b/compile.c
index d3cb079562..efe90bed10 100644
--- a/compile.c
+++ b/compile.c
@@ -11554,6 +11554,7 @@ ibf_load_outer_variables(const struct ibf_load * load, ibf_offset_t outer_variab
     for (size_t i = 0; i < table_size; i++) {
         ID key = ibf_load_id(load, (ID)ibf_load_small_value(load, &reading_pos));
         VALUE value = ibf_load_small_value(load, &reading_pos);
+        if (!key) key = rb_make_temporary_id(i);
         rb_id_table_insert(tbl, key, value);
     }