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https://issues.apache.org/jira/browse/STDCXX-307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Farid Zaripov reassigned STDCXX-307:
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Assignee: Farid Zaripov
> std::streambuf::imbue() stores locale when it shouldn't
> -------------------------------------------------------
>
> Key: STDCXX-307
> URL: https://issues.apache.org/jira/browse/STDCXX-307
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 27. Input/Output
> Affects Versions: 4.1.2, 4.1.3
> Environment: all
> Reporter: Martin Sebor
> Assignee: Farid Zaripov
> Fix For: 4.2.1
>
>
> According to 27.5.2.4.1 [streambuf.virt.locales], p3, the default behavior of
> std::streambuf::imbue() is to do nothing. The program below detects
> whether the function stores the locale passed to it (it's not expected to).
> When compiled against the latest trunk the program abots at runtime
> indicating that the function does, in fact, store the locale, contrary to the
> requirement.
> $ cat z.cpp && make z && ./z
> #include <cassert>
> #include <locale>
> #include <streambuf>
> struct MyFacet: std::locale::facet { static std::locale::id id; };
> std::locale::id MyFacet::id;
> int main ()
> {
> struct MyBuf: std::streambuf {
> void imbue (const std::locale &loc) {
> std::streambuf::imbue (loc);
> }
> } buf;
> const std::locale loc (buf.getloc (), new MyFacet);
> assert (std::has_facet<MyFacet>(loc));
> assert (!std::has_facet<MyFacet>(buf.getloc ()));
> buf.imbue (loc);
> assert (!std::has_facet<MyFacet>(buf.getloc ()));
> }
> gcc -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG
> -D_RWSTD_USE_CONFIG -I/build/sebor/dev/stdlib/include
> -I/build/sebor/gcc-4.1.0-11s/include
> -I/build/sebor/dev/stdlib/examples/include -pedantic -nostdinc++ -g -W
> -Wall -Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long z.cpp
> gcc z.o -o z -L/build/sebor/gcc-4.1.0-11s/lib -lstd11s -lsupc++ -lm
> Assertion failed: !std::has_facet<MyFacet>(buf.getloc ()), file z.cpp, line 23
> Abort (core dumped)
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