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erlang
0271-Make-re_SUITE-sub_binaries-less-unstable.p...
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File 0271-Make-re_SUITE-sub_binaries-less-unstable.patch of Package erlang
From 3f79a3d1b490e829403529fd245ab8d5120d5e0e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?John=20H=C3=B6gberg?= <john@erlang.org> Date: Tue, 27 Feb 2018 10:30:58 +0100 Subject: [PATCH] Make re_SUITE:sub_binaries less unstable The small sub-binary conversion trick in the GC broke this test pretty often on some machines. --- lib/stdlib/test/re_SUITE.erl | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/lib/stdlib/test/re_SUITE.erl b/lib/stdlib/test/re_SUITE.erl index 71f86e32e5..7b82647416 100644 --- a/lib/stdlib/test/re_SUITE.erl +++ b/lib/stdlib/test/re_SUITE.erl @@ -894,10 +894,13 @@ match_limit(Config) when is_list(Config) -> %% Test that we get sub-binaries if subject is a binary and we capture %% binaries. sub_binaries(Config) when is_list(Config) -> - Bin = list_to_binary(lists:seq(1,255)), - {match,[B,C]}=re:run(Bin,"(a)",[{capture,all,binary}]), - 255 = binary:referenced_byte_size(B), - 255 = binary:referenced_byte_size(C), - {match,[D]}=re:run(Bin,"(a)",[{capture,[1],binary}]), - 255 = binary:referenced_byte_size(D), + %% The GC can auto-convert tiny sub-binaries to heap binaries, so we + %% extract large sequences to make the test more stable. + Bin = << <<I>> || I <- lists:seq(1, 4096) >>, + {match,[B,C]}=re:run(Bin,"a(.+)$",[{capture,all,binary}]), + true = byte_size(B) =/= byte_size(C), + 4096 = binary:referenced_byte_size(B), + 4096 = binary:referenced_byte_size(C), + {match,[D]}=re:run(Bin,"a(.+)$",[{capture,[1],binary}]), + 4096 = binary:referenced_byte_size(D), ok. -- 2.16.2
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