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-rw-r--r--yarvcore.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/yarvcore.h b/yarvcore.h
index 2257bee509..0532ebc71a 100644
--- a/yarvcore.h
+++ b/yarvcore.h
@@ -478,6 +478,7 @@ struct rb_thread_struct
VALUE *machine_stack_start;
VALUE *machine_stack_end;
jmp_buf machine_regs;
+ int mark_stack_len;
/* statistics data for profiler */
VALUE stat_insn_usage;