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-rw-r--r--erts/emulator/beam/bs_instrs.tab3
1 files changed, 3 insertions, 0 deletions
diff --git a/erts/emulator/beam/bs_instrs.tab b/erts/emulator/beam/bs_instrs.tab
index b11903a47b..94e0000c8b 100644
--- a/erts/emulator/beam/bs_instrs.tab
+++ b/erts/emulator/beam/bs_instrs.tab
@@ -990,6 +990,9 @@ ctx_to_bin.execute() {
Uint hole_size;
Uint orig = mb->orig;
ErlSubBin* sb = (ErlSubBin *) boxed_val(context);
+ /* Since we're going to overwrite the match state with the result, an
+ * ErlBinMatchState must be at least as large as an ErlSubBin. */
+ ERTS_CT_ASSERT(sizeof(ErlSubBin) <= sizeof(ErlBinMatchState));
hole_size = 1 + header_arity(sb->thing_word) - ERL_SUB_BIN_SIZE;
sb->thing_word = HEADER_SUB_BIN;
sb->size = BYTE_OFFSET(size);