Bug 17574 – Range violation in std.getopt:getopt AA parsing

I discovered this while trying to figure out how to include commas in argument values: ``` import std.getopt; import std.stdio; void main() { string[string] mapping; arraySep = ","; string[] args = [ "testProgram", "-m", "a=b,c=\"d,e,f\"" ]; args.getopt("m", &mapping); writeln(mapping); } ```

Commits pushed to master at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/bb0340766b4810fd72f92d2a55981aba8006396e Fix issue 17574 - Avoid range error by checking the result of indexOf https://github.com/dlang/phobos/commit/700d44da1d104c03b5553cb9f636433b9be3434d Merge pull request #5525 from Hackerpilot/issue-17574 Fix issue 17574 - Avoid range error by checking the result of indexOf merged-on-behalf-of: H. S. Teoh <[email protected]>

Commits pushed to stable at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/bb0340766b4810fd72f92d2a55981aba8006396e Fix issue 17574 - Avoid range error by checking the result of indexOf https://github.com/dlang/phobos/commit/700d44da1d104c03b5553cb9f636433b9be3434d Merge pull request #5525 from Hackerpilot/issue-17574

Commits pushed to dmd-cxx at https://github.com/dlang/phobos https://github.com/dlang/phobos/commit/bb0340766b4810fd72f92d2a55981aba8006396e Fix issue 17574 - Avoid range error by checking the result of indexOf https://github.com/dlang/phobos/commit/700d44da1d104c03b5553cb9f636433b9be3434d Merge pull request #5525 from Hackerpilot/issue-17574