compile.c: Fix segfault when VM_INSN_INFO_TABLE_IMPL is not 2

* compile.c (ibf_dump_iseq_each): Fix a range of a conditional.
  `positions` is only used when VM_INSN_INFO_TABLE_IMPL is 2.
  And always `dump_body` is expected to be initialized by
  `iseq->body`. For example, `dump_body->insns_info.size` is
  used in `ibf_dump_insns_info_positions`.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/compile.c b/compile.c
index 9ab43e37b4..33b3b2d960 100644
--- a/compile.c
+++ b/compile.c
@@ -8900,10 +8900,10 @@ static ibf_offset_t
 ibf_dump_iseq_each(struct ibf_dump *dump, const rb_iseq_t *iseq)
 {
     struct rb_iseq_constant_body dump_body;
-    unsigned int *positions;
 #if VM_INSN_INFO_TABLE_IMPL == 2
-    dump_body = *iseq->body;
+    unsigned int *positions;
 #endif
+    dump_body = *iseq->body;
 
     dump_body.location.pathobj = ibf_dump_object(dump, dump_body.location.pathobj); /* TODO: freeze */
     dump_body.location.base_label = ibf_dump_object(dump, dump_body.location.base_label);