From 798b39ae97c9495869990fd1264ad07e61600963 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?John=20H=C3=B6gberg?= Date: Mon, 16 Jul 2018 10:51:12 +0200 Subject: Abort size calculation when a matched-out variable is used Referencing a matched-out variable in a size expression makes it impossible to calculate the size of the result based on the size of the matched binary. The compiler would still generate code to do this however, which would crash since the variable isn't defined at the size calculation. --- lib/compiler/test/bs_bincomp_SUITE.erl | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'lib/compiler/test') diff --git a/lib/compiler/test/bs_bincomp_SUITE.erl b/lib/compiler/test/bs_bincomp_SUITE.erl index 42361ea546..a5d49020a9 100644 --- a/lib/compiler/test/bs_bincomp_SUITE.erl +++ b/lib/compiler/test/bs_bincomp_SUITE.erl @@ -26,7 +26,7 @@ init_per_group/2,end_per_group/2, byte_aligned/1,bit_aligned/1,extended_byte_aligned/1, extended_bit_aligned/1,mixed/1,filters/1,trim_coverage/1, - nomatch/1,sizes/1,general_expressions/1]). + nomatch/1,sizes/1,general_expressions/1,matched_out_size/1]). -include_lib("common_test/include/ct.hrl"). @@ -35,7 +35,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> [byte_aligned, bit_aligned, extended_byte_aligned, extended_bit_aligned, mixed, filters, trim_coverage, - nomatch, sizes, general_expressions]. + nomatch, sizes, general_expressions, matched_out_size]. groups() -> []. @@ -338,6 +338,13 @@ general_expressions(_) -> -undef(BAD). +matched_out_size(Config) when is_list(Config) -> + <<1, 2>> = matched_out_size_1(<<4, 1:4, 4, 2:4>>), + ok. + +matched_out_size_1(Binary) -> + << <> || <> <= Binary>>. + cs_init() -> erts_debug:set_internal_state(available_internal_state, true), ok. -- cgit v1.2.3