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authorBjörn Gustavsson <[email protected]>2016-06-29 06:08:29 +0200
committerBjörn Gustavsson <[email protected]>2016-09-21 14:07:53 +0200
commit97820c026969de7e98d948b301da1e6956f0504d (patch)
tree5795c14f316cfddc7364a1b7e3214aa324f1e15d /lib/compiler/test
parent300698da10e777c2a466dd02accf6179dd79e130 (diff)
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bs_match_SUITE: Add a test case for beam_utils
During development, a bug in beam_utils caused a compiler failure in xmerl. If the bug reappears, make sure that we catch it when compiling the compiler test suite.
Diffstat (limited to 'lib/compiler/test')
-rw-r--r--lib/compiler/test/bs_match_SUITE.erl25
1 files changed, 23 insertions, 2 deletions
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index 224abf6c29..f8af070c44 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -38,7 +38,8 @@
no_partition/1,calling_a_binary/1,binary_in_map/1,
match_string_opt/1,select_on_integer/1,
map_and_binary/1,unsafe_branch_caching/1,
- bad_literals/1,good_literals/1,constant_propagation/1]).
+ bad_literals/1,good_literals/1,constant_propagation/1,
+ parse_xml/1]).
-export([coverage_id/1,coverage_external_ignore/2]).
@@ -69,7 +70,7 @@ groups() ->
no_partition,calling_a_binary,binary_in_map,
match_string_opt,select_on_integer,
map_and_binary,unsafe_branch_caching,
- bad_literals,good_literals,constant_propagation]}].
+ bad_literals,good_literals,constant_propagation,parse_xml]}].
init_per_suite(Config) ->
@@ -1451,6 +1452,26 @@ constant_propagation_c() ->
X
end.
+parse_xml(_Config) ->
+ <<"<?xmlX">> = do_parse_xml(<<"<?xmlX">>),
+ <<" ">> = do_parse_xml(<<"<?xml ">>),
+ ok.
+
+do_parse_xml(<<"<?xml"/utf8,Rest/binary>> = Bytes) ->
+ %% Delayed sub-binary creation is not safe. A buggy (development)
+ %% version of check_liveness_everywhere() in beam_utils would turn
+ %% on the optimization.
+ Rest1 = case is_next_char_whitespace(Rest) of
+ false ->
+ Bytes;
+ true ->
+ id(Rest)
+ end,
+ id(Rest1).
+
+is_next_char_whitespace(<<C/utf8,_/binary>>) ->
+ C =:= $\s.
+
check(F, R) ->
R = F().