https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66417
Bug ID: 66417
Summary: std::codecvt_utf16<char32_t, 0x10FFFF,
std::codecvt_mode::generate_header> generates
incorrect output
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: lcarreon at bigpond dot net.au
Target Milestone: ---
Created attachment 35696
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35696&action=edit
Test program demonstrating the problem
I am using Fedora 22 32-bit and 64-bit. I have discovered that the code
conversion facet std::codecvt_utf16<char32_t, 0x10ffff,
std::codecvt_mode::generate_header> has a problem. It generates the an
incorrect big endian result. Please see the attached test program.
I compiled the attached test program using the following command:
g++ -std=c++14 -o test_utf16 test_utf16.cpp
When I run the resulting executable, I get the following result:
fe ff 41 0 42 0 43 0
ff fe 41 0 42 0 43 0
The first line above is the big endian result and the second line is the little
endian result. Note that the BOM characters are in the right order but the
succeeding characters in the big ending result are incorrect.
