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File 2430-PER-decoding-Be-less-verbose-for-invalid-ENUMERATED.patch of Package erlang (Revision 6a6e740c0161086d7407fd293e77c355)

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From 57c1ecadd6e3ab6763b494e7a9509e67d0e6a661 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Tue, 21 Feb 2017 13:15:30 +0100
Subject: [PATCH 3/4] PER decoding: Be less verbose for invalid ENUMERATED

When an invalid value is encountered when trying to decode an
ENUMERATED, the exception can be quite verbose. Here is an actual
example from NBAP-PDU-Contents:

_ -> exit({error,{asn1,{decode_enumerated,{V4@V3,[chCode1div1,chCode2div1,chCode2div2,chCode4div1,chCode4div2,chCode4div3,chCode4div4,chCode8div1,chCode8div2,chCode8div3,chCode8div4,chCode8div5,chCode8div6,chCode8div7,chCode8div8,chCode16div1,chCode16div2,chCode16div3,chCode16div4,chCode16div5,chCode16div6,chCode16div7,chCode16div8,chCode16div9,chCode16div10,chCode16div11,chCode16div12,chCode16div13,chCode16div14,chCode16div15,chCode16div16]}}}})

Listing the possible values for an ENUMERATED when decoding fails is
not helpful and increases the code size (it would have made somewhat
more sense to list the possible values if *encoding* failed).
---
 lib/asn1/src/asn1ct_imm.erl | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index 754451b27..130f68c21 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -879,10 +879,8 @@ flatten_map_cs_1([integer_default], {Int,_}) ->
     [{'_',Int}];
 flatten_map_cs_1([enum_default], {Int,_}) ->
     [{'_',["{asn1_enum,",Int,"}"]}];
-flatten_map_cs_1([enum_error], {Var,Cs}) ->
-    Vs = [V || {_,V} <- Cs],
-    [{'_',["exit({error,{asn1,{decode_enumerated,{",Var,",",
-	   {asis,Vs},"}}}})"]}];
+flatten_map_cs_1([enum_error], {Var,_}) ->
+    [{'_',["exit({error,{asn1,{decode_enumerated,",Var,"}}})"]}];
 flatten_map_cs_1([], _) -> [].
 
 flatten_hoist_align([[{align_bits,_,_}=Ab|T]|Cs]) ->
-- 
2.12.0

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File 2430-PER-decoding-Be-less-verbose-for-invalid-ENUMERATED.patch of Package erlang (Revision 6a6e740c0161086d7407fd293e77c355)

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