https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79254
Bug ID: 79254
Summary: basic_string::operator= isn't exception safe
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc-bugzilla at daryl dot haresign.com
Target Milestone: ---
Assigning one string to another, where they have non-equal
propagate-on-copy-assignment allocators, does a `_M_destroy()`, followed by an
`assign()`. The `assign()` may throw, which leaves the string in a cleared
state.
This seems to violate the requirement specified here:
http://eel.is/c++draft/basic.string#string.require-2
A contrived example to show this:
http://coliru.stacked-crooked.com/a/1891a2678a9589d3
