[Issue 5995] string append negative integer causes segfault

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=5995

--- Comment #21 from github-bugzilla at puremagic.com ---
Commits pushed to stable at https://github.com/dlang/druntime

https://github.com/dlang/druntime/commit/316e6d2607b4b22794ef75a331ad27d970717cda
fix issue 5995

https://github.com/dlang/druntime/commit/6dbbadbac4a0567ba49f0e616fccc8c597fec771
Merge pull request #1696 from somzzz/issue_5995

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