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-rw-r--r--lib/asn1/src/asn1ct_imm.erl6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index 892178f61b..7408255aea 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -2123,8 +2123,10 @@ fixup_put_bits(Other) -> per_fixup(Other).
%% returns a value range that has the lower bound set to the lowest value
%% of all single values and lower bound values in C and the upper bound to
%% the greatest value.
-effective_constraint(integer,[C={{_,_},_}|_Rest]) -> % extension
- [C];
+effective_constraint(integer, [{{_,_}=Root,_}|_Rest]) ->
+ %% Normalize extension. Note that any range given for the
+ %% extension should be ignored anyway.
+ [{Root,[]}];
effective_constraint(integer, C) ->
SVs = get_constraints(C, 'SingleValue'),
SV = effective_constr('SingleValue', SVs),