[Bug bootstrap/85843] Invalid C++ in libstd++

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85843

--- Comment #2 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sun, May 20, 2018 at 03:46:59AM +0000, sgk at troutmask dot
apl.washington.edu wrote:
> 
> svn merge -rhead:260263 .
> 

Further bisection.

svn merge -r260380:260379 .


So, r260380 is the cause of the bootstrap issue.
Can someone please fix the issue or revert the patch?