[v3] libstdc++/9169

[Gabriel Dos Reis]

Paolo Carlini <pcarlini@unitus.it> writes:

| Paolo Carlini wrote:
| 
| > Hi,
| >
| > I'm committing to trunk, and soon, 3_3, the below,
| > tested x86-linux, approved by Benjamin.
| 
| Gaby, I'd like to push this one for 3_2 too: having fixed
| libstdc++/9168 there, not fixing libstdc++/9169 leads to an 'apparent'
| regression on the important testcase accompanying libstdc++/9169:
| before it used to pass as a side effect of libstdc++/9168 bug.

OK.

-- Gaby