https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christian Franke from comment #3)
> > The extern templates are disabled because std::basic_string has additional
> > member functions in C++17 mode, and they're not instantiated in the library.
> > By disabling the explicit instantiation declarations the compiler will emit
> > definitions for the C++17-only member functions.
> This has no effect due to the bogus specialization in basic_string.h (see
> patch below).
What's bogus about it?
> Sorry. New testcase below:
Thanks.
> $ g++ -std=c++17 -o getlinetest getlinetest.cpp && ./getlinetest; echo $?
> Aborted (core dumped)
> 134
Could you please debug this to find where it's crashing and why?
> $ g++ -std=c++17 -static -o getlinetest getlinetest.cpp && ./getlinetest;\
> echo $?
> 42
>
> Interestingly the statically linked version works. Is there possibly some
> template function called by getline() which is not C++17 compatible?
There should be nothing in libstdc++ which is not C++17 compatible.
> Possible fix (char only, should also be done for wchar_t):
This patch won't be accepted, it's papering over some other problem not fixing
anything.
