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-rw-r--r--language/l2.lem1
1 files changed, 1 insertions, 0 deletions
diff --git a/language/l2.lem b/language/l2.lem
index 54b31eb5..4d26f9b7 100644
--- a/language/l2.lem
+++ b/language/l2.lem
@@ -74,6 +74,7 @@ type base_effect_aux = (* effect *)
| BE_undef (* undefined-instruction exception *)
| BE_unspec (* unspecified values *)
| BE_nondet (* nondeterminism from intra-instruction parallelism *)
+ | BE_lset (* Local mutation happend; not user-writable *)
type base_effect =