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-rw-r--r--erts/emulator/beam/erl_debug.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_debug.h b/erts/emulator/beam/erl_debug.h
index f4259e7dae..029320691d 100644
--- a/erts/emulator/beam/erl_debug.h
+++ b/erts/emulator/beam/erl_debug.h
@@ -48,6 +48,7 @@
#define DEBUG_THREADS 0x0010 /* Thread-related stuff */
#define DEBUG_PROCESSES 0x0020 /* Process creation and removal */
#define DEBUG_MEMORY 0x0040 /* Display results of memory checks */
+#define DEBUG_SHCOPY 0x0080 /* Sharing-preserving copying of terms */
extern Uint32 verbose;