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-rw-r--r--lib/compiler/src/beam_except.erl29
1 files changed, 16 insertions, 13 deletions
diff --git a/lib/compiler/src/beam_except.erl b/lib/compiler/src/beam_except.erl
index d261809765..4a181c1923 100644
--- a/lib/compiler/src/beam_except.erl
+++ b/lib/compiler/src/beam_except.erl
@@ -1,18 +1,19 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2011-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2011-2016. All Rights Reserved.
%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
%%
%% %CopyrightEnd%
%%
@@ -132,10 +133,12 @@ translate_exception(_, _, _, _) -> no.
fix_block(Is, 0) ->
reverse(Is);
fix_block(Is, Words) ->
- fix_block_1(reverse(Is), Words).
+ reverse(fix_block_1(Is, Words)).
-fix_block_1([{set,[],[],{alloc,Live,{F1,F2,Needed,F3}}}|Is], Words) ->
- [{set,[],[],{alloc,Live,{F1,F2,Needed-Words,F3}}}|Is];
+fix_block_1([{set,[],[],{alloc,Live,{F1,F2,Needed0,F3}}}|Is], Words) ->
+ Needed = Needed0 - Words,
+ true = Needed >= 0, %Assertion.
+ [{set,[],[],{alloc,Live,{F1,F2,Needed,F3}}}|Is];
fix_block_1([I|Is], Words) ->
[I|fix_block_1(Is, Words)].