https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94007
Bug ID: 94007
Summary: Appending a view into a string to the same string
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: philwill at fb dot com
Target Milestone: ---
std::string a = "...whatever...";
a.append(a.data(), a.size());
// a must now contain 2 copies of whatever it had in it before
With current trunk libstdc++ this doesn't work if `a` needs to be resized
during `append` because the original buffer is deallocated before the copy of
the bytes being appended is performed.
Anyone encountering this bug can work around it by ensuring that they have
called `reserve` with an appropriate size before calling `append` so that
`append` does not need to resize the buffer.
