The bug is not completely fixed. toDelegate() still does not work well with @safe function pointers... because toDelegate() is unsafe. And variadic arguments are ignored.
It's indeed reasonable to make the parameter auto ref because fp can be a structure with opCall since r1528. But ref return is not necessary for toDelegate() itself.
std.contracts: added functions pointsTo()
std.numeric: minor unittest fixes.
std.bitmanip: fixed code bloat issue, reintroduced FloatRep and DoubleRep.
std.conv: minor simplification of implementation.
std.regexp: added reference to ECMA standard in the documentation.
std.getopt: changed return type from bool to void, error is signaled by use of exceptions.
std.functional: added unaryFun, binaryFun, adjoin.
std.string: updated documentation, changed code to compile with warnings enabled.
std.traits: changed FieldTypeTuple; added RepresentationTypeTuple, hasAliasing; fixed bug 1826; added call to flush() from within write; fixed unlisted bug in lines().
std.algorithm: added map, reduce, filter, inPlace, move, swap, overwriteAdjacent, find, findRange, findBoyerMoore, findAdjacent, findAmong, findAmongSorted, canFind, canFindAmong, canFindAmongSorted, count, equal, overlap, min, max, mismatch, EditOp, none, substitute, insert, remove, levenshteinDistance, levenshteinDistanceAndPath, copy, copyIf, iterSwap, swapRanges, reverse, rotate, SwapStrategy, Unstable, Semistable, Stable, eliminate, partition, nthElement, sort, schwartzSort, partialSort, isSorted, makeIndex, schwartzMakeIndex, lowerBound, upperBound, equalRange, canFindSorted.
std.thread: fixed so it compiles with warnings enabled.
std.file: made getSize() faster under Linux.
std.random: fixed so it compiles with warnings enabled; improved function uniform so it deduces type generated from its arguments.
std.format: added fixes to make formatting work with const data.
std.path: minor documentation changes.