diff --git a/NEWS.md b/NEWS.md
index 8dd55d403e7b5..6bbf77b67b9d7 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -64,6 +64,7 @@ Compiler/Runtime improvements
   Code that requires assumptions about object layout and addresses (usually for
   interoperability with C or other languages) might need to be updated; for
   example any object that needs a stable address should be a `mutable struct`.
+  As a result, Array `view`s no longer allocate ([#34126]).
 
 Command-line option changes
 ---------------------------
diff --git a/base/array.jl b/base/array.jl
index 7ec05e443ee88..d52997bf7af53 100644
--- a/base/array.jl
+++ b/base/array.jl
@@ -320,6 +320,15 @@ Copy `N` elements from collection `src` starting at offset `so`, to array `dest`
 offset `do`. Return `dest`.
 """
 function copyto!(dest::Array, doffs::Integer, src::Array, soffs::Integer, n::Integer)
+    return _copyto_impl!(dest, doffs, src, soffs, n)
+end
+
+# this is only needed to avoid possible ambiguities with methods added in some packages
+function copyto!(dest::Array{T}, doffs::Integer, src::Array{T}, soffs::Integer, n::Integer) where T
+    return _copyto_impl!(dest, doffs, src, soffs, n)
+end
+
+function _copyto_impl!(dest::Array, doffs::Integer, src::Array, soffs::Integer, n::Integer)
     n == 0 && return dest
     n > 0 || _throw_argerror()
     if soffs < 1 || doffs < 1 || soffs+n-1 > length(src) || doffs+n-1 > length(dest)
@@ -339,6 +348,9 @@ end
 
 copyto!(dest::Array, src::Array) = copyto!(dest, 1, src, 1, length(src))
 
+# also to avoid ambiguities in packages
+copyto!(dest::Array{T}, src::Array{T}) where {T} = copyto!(dest, 1, src, 1, length(src))
+
 # N.B: The generic definition in multidimensional.jl covers, this, this is just here
 # for bootstrapping purposes.
 function fill!(dest::Array{T}, x) where T
@@ -1762,8 +1774,8 @@ CartesianIndex(1, 1)
 ```
 """
 function findnext(testf::Function, A, start)
+    i = oftype(first(keys(A)), start)
     l = last(keys(A))
-    i = oftype(l, start)
     i > l && return nothing
     while true
         testf(A[i]) && return i
diff --git a/base/boot.jl b/base/boot.jl
index 33dfe984e9ba5..f80fd674521ee 100644
--- a/base/boot.jl
+++ b/base/boot.jl
@@ -370,6 +370,7 @@ _new(:QuoteNode, :Any)
 _new(:SSAValue, :Int)
 eval(Core, :(LineNumberNode(l::Int) = $(Expr(:new, :LineNumberNode, :l, nothing))))
 eval(Core, :(LineNumberNode(l::Int, @nospecialize(f)) = $(Expr(:new, :LineNumberNode, :l, :f))))
+LineNumberNode(l::Int, f::String) = LineNumberNode(l, Symbol(f))
 eval(Core, :(GlobalRef(m::Module, s::Symbol) = $(Expr(:new, :GlobalRef, :m, :s))))
 eval(Core, :(SlotNumber(n::Int) = $(Expr(:new, :SlotNumber, :n))))
 eval(Core, :(TypedSlot(n::Int, @nospecialize(t)) = $(Expr(:new, :TypedSlot, :n, :t))))
diff --git a/base/dict.jl b/base/dict.jl
index b3387d84c9ca2..109538e70cf4f 100644
--- a/base/dict.jl
+++ b/base/dict.jl
@@ -742,7 +742,7 @@ Create a new entry in the `ImmutableDict` for a `key => value` pair
 ImmutableDict
 ImmutableDict(KV::Pair{K,V}) where {K,V} = ImmutableDict{K,V}(KV[1], KV[2])
 ImmutableDict(t::ImmutableDict{K,V}, KV::Pair) where {K,V} = ImmutableDict{K,V}(t, KV[1], KV[2])
-ImmutableDict(KV::Pair, rest::Pair...) = ImmutableDict(ImmutableDict(rest...), KV)
+ImmutableDict(KV::Pair, rest::Pair...) = ImmutableDict(ImmutableDict(KV), rest...)
 
 function in(key_value::Pair, dict::ImmutableDict, valcmp=(==))
     key, value = key_value
diff --git a/base/math.jl b/base/math.jl
index ce9780269ba1c..06458f0ca2766 100644
--- a/base/math.jl
+++ b/base/math.jl
@@ -101,7 +101,7 @@ end
 """
     evalpoly(x, p)
 
-Evaluate the polynomial ``\\sum_k p[k] x^{k-1}`` for the coefficients `p[1]`, `p[2]`, ...;
+Evaluate the polynomial ``\\sum_k x^{k-1} p[k]`` for the coefficients `p[1]`, `p[2]`, ...;
 that is, the coefficients are given in ascending order by power of `x`.
 Loops are unrolled at compile time if the number of coefficients is statically known, i.e.
 when `p` is a `Tuple`.
@@ -210,7 +210,7 @@ end
 """
     @evalpoly(z, c...)
 
-Evaluate the polynomial ``\\sum_k c[k] z^{k-1}`` for the coefficients `c[1]`, `c[2]`, ...;
+Evaluate the polynomial ``\\sum_k z^{k-1} c[k]`` for the coefficients `c[1]`, `c[2]`, ...;
 that is, the coefficients are given in ascending order by power of `z`.  This macro expands
 to efficient inline code that uses either Horner's method or, for complex `z`, a more
 efficient Goertzel-like algorithm.
diff --git a/base/reduce.jl b/base/reduce.jl
index 414bac5099f78..6d19fa50e3037 100644
--- a/base/reduce.jl
+++ b/base/reduce.jl
@@ -306,25 +306,29 @@ with reduction `op` over an empty array with element type of `T`.
 
 If not defined, this will throw an `ArgumentError`.
 """
-reduce_empty(op, T) = _empty_reduce_error()
-reduce_empty(::typeof(+), T) = zero(T)
+reduce_empty(op, ::Type{T}) where {T} = _empty_reduce_error()
+reduce_empty(::typeof(+), ::Type{Union{}}) = _empty_reduce_error()
+reduce_empty(::typeof(+), ::Type{T}) where {T} = zero(T)
 reduce_empty(::typeof(+), ::Type{Bool}) = zero(Int)
-reduce_empty(::typeof(*), T) = one(T)
+reduce_empty(::typeof(*), ::Type{Union{}}) = _empty_reduce_error()
+reduce_empty(::typeof(*), ::Type{T}) where {T} = one(T)
 reduce_empty(::typeof(*), ::Type{<:AbstractChar}) = ""
 reduce_empty(::typeof(&), ::Type{Bool}) = true
 reduce_empty(::typeof(|), ::Type{Bool}) = false
 
-reduce_empty(::typeof(add_sum), T) = reduce_empty(+, T)
+reduce_empty(::typeof(add_sum), ::Type{Union{}}) = _empty_reduce_error()
+reduce_empty(::typeof(add_sum), ::Type{T}) where {T} = reduce_empty(+, T)
 reduce_empty(::typeof(add_sum), ::Type{T}) where {T<:SmallSigned}  = zero(Int)
 reduce_empty(::typeof(add_sum), ::Type{T}) where {T<:SmallUnsigned} = zero(UInt)
-reduce_empty(::typeof(mul_prod), T) = reduce_empty(*, T)
+reduce_empty(::typeof(mul_prod), ::Type{Union{}}) = _empty_reduce_error()
+reduce_empty(::typeof(mul_prod), ::Type{T}) where {T} = reduce_empty(*, T)
 reduce_empty(::typeof(mul_prod), ::Type{T}) where {T<:SmallSigned}  = one(Int)
 reduce_empty(::typeof(mul_prod), ::Type{T}) where {T<:SmallUnsigned} = one(UInt)
 
-reduce_empty(op::BottomRF, T) = reduce_empty(op.rf, T)
-reduce_empty(op::MappingRF, T) = mapreduce_empty(op.f, op.rf, T)
-reduce_empty(op::FilteringRF, T) = reduce_empty(op.rf, T)
-reduce_empty(op::FlipArgs, T) = reduce_empty(op.f, T)
+reduce_empty(op::BottomRF, ::Type{T}) where {T} = reduce_empty(op.rf, T)
+reduce_empty(op::MappingRF, ::Type{T}) where {T} = mapreduce_empty(op.f, op.rf, T)
+reduce_empty(op::FilteringRF, ::Type{T}) where {T} = reduce_empty(op.rf, T)
+reduce_empty(op::FlipArgs, ::Type{T}) where {T} = reduce_empty(op.f, T)
 
 """
     Base.mapreduce_empty(f, op, T)
diff --git a/base/subarray.jl b/base/subarray.jl
index 1df45f8d78781..ba891183924bb 100644
--- a/base/subarray.jl
+++ b/base/subarray.jl
@@ -64,7 +64,7 @@ size(V::SubArray) = (@_inline_meta; map(n->Int(unsafe_length(n)), axes(V)))
 
 similar(V::SubArray, T::Type, dims::Dims) = similar(V.parent, T, dims)
 
-sizeof(V::SubArray) = length(V) * sizeof(eltype(V))
+sizeof(V::SubArray) = length(V) * elsize(V.parent)
 
 copy(V::SubArray) = V.parent[V.indices...]
 
diff --git a/base/weakkeydict.jl b/base/weakkeydict.jl
index 079015ba8cd16..f21097ddfb3ef 100644
--- a/base/weakkeydict.jl
+++ b/base/weakkeydict.jl
@@ -69,6 +69,7 @@ function WeakKeyDict(kv)
     end
 end
 
+sizehint!(d::WeakKeyDict, newsz) = sizehint!(d.ht, newsz)
 empty(d::WeakKeyDict, ::Type{K}, ::Type{V}) where {K, V} = WeakKeyDict{K, V}()
 
 islocked(wkh::WeakKeyDict) = islocked(wkh.lock)
diff --git a/deps/Versions.make b/deps/Versions.make
index 7a391be382325..fc381abe4896b 100644
--- a/deps/Versions.make
+++ b/deps/Versions.make
@@ -33,7 +33,7 @@ LIBUV_BB_REL = 0
 OBJCONV_VER = 2.49.0
 OBJCONV_BB_REL = 0
 ZLIB_VER = 1.2.11
-ZLIB_BB_REL = 6
+ZLIB_BB_REL = 10
 P7ZIP_VER = 16.2.0
 P7ZIP_BB_REL = 1
 
diff --git a/deps/checksums/Pkg-eb3726d8f9c68bb91707a5c0e9809c95f1c1eee7.tar.gz/md5 b/deps/checksums/Pkg-eb3726d8f9c68bb91707a5c0e9809c95f1c1eee7.tar.gz/md5
deleted file mode 100644
index 1364874623093..0000000000000
--- a/deps/checksums/Pkg-eb3726d8f9c68bb91707a5c0e9809c95f1c1eee7.tar.gz/md5
+++ /dev/null
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deleted file mode 100644
index b5d18e89f3d0f..0000000000000
--- a/deps/checksums/Pkg-eb3726d8f9c68bb91707a5c0e9809c95f1c1eee7.tar.gz/sha512
+++ /dev/null
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new file mode 100644
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new file mode 100644
index 0000000000000..d91c754e91496
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new file mode 100644
index 0000000000000..cf856f514f1fe
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new file mode 100644
index 0000000000000..b7c828d720ff7
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deleted file mode 100644
index 2ce09501ba824..0000000000000
--- a/deps/checksums/Statistics-a87c385b812e6576be984cae96beae64252214f0.tar.gz/md5
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deleted file mode 100644
index 8d95c0b1d15e4..0000000000000
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new file mode 100644
index 0000000000000..5cfb66f75df19
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index 0000000000000..7190114e8c8a2
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new file mode 100644
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@@ -0,0 +1 @@
+857225765e3af15463128b7d4aca87c358c34c802fbf7863cdeed06f958b2c3976750c8583bfcf0ef12c106519563248f80a676337d340fddfc005f7cab09b7c
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/md5
new file mode 100644
index 0000000000000..36752a8ff77b4
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/md5
@@ -0,0 +1 @@
+b073327b80d77fcb321aa90ac054f3bc
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/sha512
new file mode 100644
index 0000000000000..46257881f45d0
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-apple-darwin14.tar.gz/sha512
@@ -0,0 +1 @@
+3e568123255eb2e3fd6b59395ebc72407743f596ead1cc2efaf1f2cbdb88f554ea53cf7caa3f062a8a6695eeb591a6f6ff1304bd0915b148fce4849c36e915e2
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/md5
new file mode 100644
index 0000000000000..0223a5fba0345
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/md5
@@ -0,0 +1 @@
+9b387576651cf42d2cba762509603aa0
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/sha512
new file mode 100644
index 0000000000000..62af5484db9ae
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-gnu.tar.gz/sha512
@@ -0,0 +1 @@
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diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/md5
new file mode 100644
index 0000000000000..7a9589bf3255d
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/md5
@@ -0,0 +1 @@
+8eb752c5fb3f1f013a91ba84db33f268
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/sha512
new file mode 100644
index 0000000000000..1b6ab531d9ebb
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-linux-musl.tar.gz/sha512
@@ -0,0 +1 @@
+9c4b198cceffc5e3c87e91fa4f9223b973b090f5a343b1ea84425cbb445a7d9a34926ca55e4febae8783fbba3390b3a1aa2bd59b3177335a544c862bd55b8ec5
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/md5
new file mode 100644
index 0000000000000..7a2282753a6f8
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/md5
@@ -0,0 +1 @@
+bffe25dd8fb78bbf881785eef64202d5
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/sha512
new file mode 100644
index 0000000000000..07ff8b9147ade
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-unknown-freebsd11.1.tar.gz/sha512
@@ -0,0 +1 @@
+2215ee8ebd3415f35a4f488537b2bb525bc8fef74419b2182bb8bc5b2e236fa7fb637c6aaa234e840c94c3940a71441e5a2dc9e7fb5d674372175a30dbb5fa19
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/md5
new file mode 100644
index 0000000000000..957c62c98ebf2
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/md5
@@ -0,0 +1 @@
+9efba92de9aa49b43822309fcdce046a
diff --git a/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/sha512
new file mode 100644
index 0000000000000..6e8d8f638743e
--- /dev/null
+++ b/deps/checksums/Zlib.v1.2.11-10.x86_64-w64-mingw32.tar.gz/sha512
@@ -0,0 +1 @@
+c76553c7b79c8f2ed20dcbfbb55ebe06636e238c3ba7028beef84547cf1ee82c2a2a293712c9241e7b60cb5cf6c907eec7046b272a0ef26aed805eae4947a9c6
diff --git a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/md5
deleted file mode 100644
index 00da64ec9a6a0..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-9f518cd093311ea2c8ff624b06aaa4cd
diff --git a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/sha512
deleted file mode 100644
index e8006fef420c6..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/md5
deleted file mode 100644
index 216075ed1144e..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-5157dfaf0a62241553783d38d6fa565c
diff --git a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/sha512
deleted file mode 100644
index 631e470856d08..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.aarch64-linux-musl.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/md5
deleted file mode 100644
index 4485a55d43f41..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-2d42d6a3899b974f9c56c4fabfa34459
diff --git a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/sha512
deleted file mode 100644
index 31a1f61e0ff23..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-gnueabihf.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-138254be838d7a9e356632785e5af30a562b498605e366e932011d9a41778e5a81c9073aa698529f95aa1101f2a7642e7ae81449f734d5e7bf0e3b4f26fedcae
diff --git a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/md5
deleted file mode 100644
index 4dbcf6944a4a2..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-5db5f13979777caac31c830b66e75e8f
diff --git a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/sha512
deleted file mode 100644
index c47463b86564c..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.armv7l-linux-musleabihf.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-6088b1a14ff372a2b7d28187edcfe85b613242b812ae23cbaea88da1e580105f38f65f70b2e80833711e2e99ac1683bdf451d55e5dc9283bb7e8dd582680acfb
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/md5
deleted file mode 100644
index b5d6d15e0769a..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-46d03f5f9190cb787e867c3eb7edea78
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/sha512
deleted file mode 100644
index 008795089e144..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-ca08a089148260c2b6d81a87a1e00a4e3a881c6d8bdad0d00b3e42a56cc91a7b72b542a748fc01a49ce207785053636587417916c6ec0d112fae49c55f34fb65
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/md5
deleted file mode 100644
index 811bce75bde6b..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-34725ad0598db3cd7817e3578453f1d8
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/sha512
deleted file mode 100644
index 1936e8f8500e4..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-linux-musl.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-b2706f68cecc21ab5013b07c226eda8fd1a68101bd17fcd79b991ac3b74d9b9e63e54f804a48a86ea448c5695c3284ac11c07592ae76a10b4fd6f5881c3ee277
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/md5
deleted file mode 100644
index 2074ae57eb49f..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-89611cfd8f7c987de8b8c8cfd9eaeae6
diff --git a/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/sha512
deleted file mode 100644
index 482a799d0b6a9..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.i686-w64-mingw32.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-128f0a2db6045c7e886dc283c93a3bff3f7bd64d2b2bcea0e4e67aac6c8e76ef9abcdac10cc56f5880ae32160ffe5ee4b42fdc9bc1fd3e07104776e16dc05aa0
diff --git a/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/md5
deleted file mode 100644
index e7b88b4458ee3..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-1c32a314230b46db6eb02e72bd8b8b47
diff --git a/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/sha512
deleted file mode 100644
index 9be88af9676b5..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.powerpc64le-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/md5
deleted file mode 100644
index 5316272ba1928..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-0e14dd815045e47dd722ff55434428d1
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/sha512
deleted file mode 100644
index 7b21de4c41657..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-apple-darwin14.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-4111e99386cab30de2f1c625079991576e97446c8a85bc37c05629ddf7b867bc32a74b94ed5552c2b057c4cf14f85cbc06b62459ed800cd9faa5a40382a6e958
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/md5
deleted file mode 100644
index 77123e338d051..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-9fcc23ef8cf1740418a147905f7aa45c
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/sha512
deleted file mode 100644
index 089693b3315bd..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-gnu.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-2da223cb96bcd1845c8b84b44f779c8d464fd8dc21a8c8d7b065da07e7d995db627b9a2df1dc5247f70d1cd9e23f31c118288a0b3047884b19edd886e1dd6f2b
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/md5
deleted file mode 100644
index 538081546aba3..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-b3e690fe03ab5f57118ae2cff0e82f35
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/sha512
deleted file mode 100644
index 74786b8dcd156..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-linux-musl.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-cea679067b995a5503922e81c50dda603b0b9634bb07b54073f74e2d0ccd638ec6c10ab26ae09c5a3566c44d4ee78419abc99f22da55c8131901aa72f790cc5c
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/md5
deleted file mode 100644
index 85a8c96a236b6..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-34a32be8fed7b26b3cef2f7c367241b8
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/sha512
deleted file mode 100644
index 5b033470ec838..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-unknown-freebsd11.1.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-ba351d5415c86457b487e0078b8a86f2429e8c2aef8f3edb48647de8a2b7d05accf9582e8b58f49b46a67684b59c1bfa9ebda6ec93724747128c93f9efd69fa1
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/md5 b/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/md5
deleted file mode 100644
index 011042642da29..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/md5
+++ /dev/null
@@ -1 +0,0 @@
-66292bfea89453db4945639d454fa739
diff --git a/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/sha512 b/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/sha512
deleted file mode 100644
index a9cdbe9cd278d..0000000000000
--- a/deps/checksums/Zlib.v1.2.11-6.x86_64-w64-mingw32.tar.gz/sha512
+++ /dev/null
@@ -1 +0,0 @@
-2f2ec74977e5a713c2336a0ef5f2553ec5393285ae3a6914ab8d9b535337ad36d9f07fc180df10db302d96dc6b9ca2d7d178a9f42b906276b97b597953dc4782
diff --git a/deps/zlib.mk b/deps/zlib.mk
index 0de264223ea06..cdefe1b81ab82 100644
--- a/deps/zlib.mk
+++ b/deps/zlib.mk
@@ -5,7 +5,7 @@ $(eval $(call git-external,zlib,ZLIB,,,$(SRCCACHE)))
 ifneq ($(USE_BINARYBUILDER_ZLIB), 1)
 $(BUILDDIR)/$(ZLIB_SRC_DIR)/build-configured: $(SRCCACHE)/$(ZLIB_SRC_DIR)/source-extracted
 	mkdir -p $(dir $@)
-	cd $(dir $@) && $(dir $<)/configure --prefix=$(abspath $(build_prefix)) --libdir=$(abspath $(build_libdir))
+	cd $(dir $@) && $(CMAKE) -DCMAKE_INSTALL_PREFIX=$(abspath $(build_prefix)) -DCMAKE_BUILD_TYPE=Release -DUNIX=true $(dir $<)
 	echo 1 > $@
 
 $(BUILDDIR)/$(ZLIB_SRC_DIR)/build-compiled: $(BUILDDIR)/$(ZLIB_SRC_DIR)/build-configured
diff --git a/doc/src/manual/distributed-computing.md b/doc/src/manual/distributed-computing.md
index 2a7f10e01b221..a1f30e579b5ec 100644
--- a/doc/src/manual/distributed-computing.md
+++ b/doc/src/manual/distributed-computing.md
@@ -1,4 +1,4 @@
-# Multi-process and Distributed Processing
+# Multi-processing and Distributed Computing
 
 An implementation of distributed memory parallel computing is provided by module `Distributed`
 as part of the standard library shipped with Julia.
@@ -760,7 +760,7 @@ SharedArray{T,N}(dims::NTuple; init=false, pids=Int[])
 which creates an `N`-dimensional shared array of a bits type `T` and size `dims` across the processes specified
 by `pids`. Unlike distributed arrays, a shared array is accessible only from those participating
 workers specified by the `pids` named argument (and the creating process too, if it is on the
-same host).
+same host). Note that only elements that are [`isbits`](@ref) are supported in a SharedArray.
 
 If an `init` function, of signature `initfn(S::SharedArray)`, is specified, it is called on all
 the participating workers. You can specify that each worker runs the `init` function on a distinct
diff --git a/src/cgutils.cpp b/src/cgutils.cpp
index 87c3b5ee75f34..d23bf9c20e7e6 100644
--- a/src/cgutils.cpp
+++ b/src/cgutils.cpp
@@ -702,7 +702,7 @@ static Type *_julia_struct_to_llvm(jl_codegen_params_t *ctx, jl_value_t *jt, jl_
                 Type *AlignmentType = IntegerType::get(jl_LLVMContext, 8 * al);
                 unsigned NumATy = fsz / al;
                 unsigned remainder = fsz % al;
-                assert(NumATy > 0);
+                assert(al == 1 || NumATy > 0);
                 while (NumATy--)
                     latypes.push_back(AlignmentType);
                 while (remainder--)
diff --git a/src/codegen.cpp b/src/codegen.cpp
index b171db9047465..487f1a365a171 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -2484,7 +2484,7 @@ static bool emit_builtin_call(jl_codectx_t &ctx, jl_cgval_t *ret, jl_value_t *f,
             *ret = mark_julia_type(ctx, len, false, jl_long_type);
             return true;
         }
-        else if (jl_is_datatype(sty) && sty->name == jl_array_typename) {
+        else if (jl_is_array_type(sty)) {
             auto len = emit_arraylen(ctx, obj);
             jl_value_t *ety = jl_tparam0(sty);
             Value *elsize;
@@ -2495,6 +2495,11 @@ static bool emit_builtin_call(jl_codectx_t &ctx, jl_cgval_t *ret, jl_value_t *f,
                 if (isboxed) {
                     elsize = ConstantInt::get(T_size, sizeof(void*));
                 }
+                else if (jl_is_primitivetype(ety)) {
+                    // Primitive types should use the array element size, but
+                    // this can be different from the type's size
+                    elsize = ConstantInt::get(T_size, LLT_ALIGN(elsz, al));
+                }
                 else {
                     elsize = ConstantInt::get(T_size, elsz);
                 }
diff --git a/src/llvm-api.cpp b/src/llvm-api.cpp
index 03fc39cf091a1..1ec13fca7918d 100644
--- a/src/llvm-api.cpp
+++ b/src/llvm-api.cpp
@@ -14,6 +14,7 @@
 
 #include <llvm/ADT/Triple.h>
 #include <llvm/Analysis/TargetLibraryInfo.h>
+#include <llvm/Analysis/TargetTransformInfo.h>
 #include <llvm/IR/Attributes.h>
 #include <llvm/IR/CallSite.h>
 #include <llvm/IR/DebugInfo.h>
@@ -24,6 +25,7 @@
 #include <llvm/IR/Module.h>
 #include <llvm/Support/TargetSelect.h>
 #include <llvm/Transforms/IPO.h>
+#include <llvm/Transforms/Utils/ModuleUtils.h>
 
 #include "julia.h"
 
@@ -208,6 +210,28 @@ extern "C" JL_DLLEXPORT void LLVMExtraAddInternalizePassWithExportList(
     unwrap(PM)->add(createInternalizePass(PreserveFobj));
 }
 
+extern "C" JL_DLLEXPORT void LLVMExtraAppendToUsed(LLVMModuleRef Mod,
+                                                   LLVMValueRef* Values,
+                                                   size_t Count) {
+    SmallVector<GlobalValue *, 1> GlobalValues;
+    for (auto *Value : makeArrayRef(Values, Count))
+        GlobalValues.push_back(cast<GlobalValue>(unwrap(Value)));
+    appendToUsed(*unwrap(Mod), GlobalValues);
+}
+
+extern "C" JL_DLLEXPORT void LLVMExtraAppendToCompilerUsed(LLVMModuleRef Mod,
+                                                           LLVMValueRef* Values,
+                                                           size_t Count) {
+    SmallVector<GlobalValue *, 1> GlobalValues;
+    for (auto *Value : makeArrayRef(Values, Count))
+        GlobalValues.push_back(cast<GlobalValue>(unwrap(Value)));
+    appendToCompilerUsed(*unwrap(Mod), GlobalValues);
+}
+
+extern "C" JL_DLLEXPORT void LLVMExtraAddGenericAnalysisPasses(LLVMPassManagerRef PM) {
+    unwrap(PM)->add(createTargetTransformInfoWrapperPass(TargetIRAnalysis()));
+}
+
 
 // Awaiting D46627
 
diff --git a/stdlib/Distributed/src/clusterserialize.jl b/stdlib/Distributed/src/clusterserialize.jl
index 6bca816687af3..c50393caeb0f5 100644
--- a/stdlib/Distributed/src/clusterserialize.jl
+++ b/stdlib/Distributed/src/clusterserialize.jl
@@ -2,7 +2,7 @@
 
 using Serialization: serialize_cycle, deserialize_cycle, writetag,
                      serialize_typename, deserialize_typename,
-                     TYPENAME_TAG, reset_state, serialize_type
+                     TYPENAME_TAG, TASK_TAG, reset_state, serialize_type
 using Serialization.__deserialized_types__
 
 import Serialization: object_number, lookup_object_number, remember_object
@@ -102,6 +102,26 @@ function serialize(s::ClusterSerializer, t::Core.TypeName)
     nothing
 end
 
+function serialize(s::ClusterSerializer, t::Task)
+    serialize_cycle(s, t) && return
+    if istaskstarted(t) && !istaskdone(t)
+        error("cannot serialize a running Task")
+    end
+    writetag(s.io, TASK_TAG)
+    serialize(s, t.code)
+    serialize(s, t.storage)
+    bt = t.backtrace
+    if bt !== nothing
+        if !isa(bt, Vector{Any})
+            bt = Base.process_backtrace(bt, 100)
+        end
+        serialize(s, bt)
+    end
+    serialize(s, t.state)
+    serialize(s, t.result)
+    serialize(s, t.exception)
+end
+
 function serialize(s::ClusterSerializer, g::GlobalRef)
     # Record if required and then invoke the default GlobalRef serializer.
     sym = g.name
@@ -231,6 +251,23 @@ function deserialize(s::ClusterSerializer, t::Type{<:CapturedException})
     return CapturedException(capex, bt)
 end
 
+function deserialize(s::ClusterSerializer, ::Type{Task})
+    t = Task(nothing)
+    deserialize_cycle(s, t)
+    t.code = deserialize(s)
+    t.storage = deserialize(s)
+    state_or_bt = deserialize(s)
+    if state_or_bt isa Symbol
+        t.state = state_or_bt
+    else
+        t.backtrace = state_or_bt
+        t.state = deserialize(s)
+    end
+    t.result = deserialize(s)
+    t.exception = deserialize(s)
+    t
+end
+
 """
     clear!(syms, pids=workers(); mod=Main)
 
diff --git a/stdlib/Distributed/test/distributed_exec.jl b/stdlib/Distributed/test/distributed_exec.jl
index 821e999d8d1ef..8bc5c419ade05 100644
--- a/stdlib/Distributed/test/distributed_exec.jl
+++ b/stdlib/Distributed/test/distributed_exec.jl
@@ -1676,6 +1676,19 @@ let (h, t) = Distributed.head_and_tail(Int[], 0)
     @test collect(t) == []
 end
 
+# issue #35937
+let e
+    try
+        pmap(1) do _
+            wait(@async error(42))
+        end
+    catch ex
+        e = ex
+    end
+    # check that the inner TaskFailedException is correctly formed & can be printed
+    @test sprint(showerror, e) isa String
+end
+
 include("splitrange.jl")
 
 # Run topology tests last after removing all workers, since a given
diff --git a/stdlib/InteractiveUtils/src/InteractiveUtils.jl b/stdlib/InteractiveUtils/src/InteractiveUtils.jl
index 48bb13b961a6f..a2abf8730cd84 100644
--- a/stdlib/InteractiveUtils/src/InteractiveUtils.jl
+++ b/stdlib/InteractiveUtils/src/InteractiveUtils.jl
@@ -363,13 +363,14 @@ function report_bug(kind)
         let Pkg = Base.require(Base.PkgId(
             Base.UUID((0x44cfe95a_1eb2_52ea,0xb672_e2afdf69b78f)), "Pkg"))
             mktempdir() do tmp
-                prev_active = Base.ACTIVE_PROJECT[]
-                env_path = joinpath(tmp, "TmpForBugReporting")
-                Pkg.generate(env_path)
-                Pkg.activate(env_path)
+                old_load_path = copy(LOAD_PATH)
+                push!(empty!(LOAD_PATH), joinpath(tmp, "Project.toml"))
+                old_home_project = Base.HOME_PROJECT[]
+                Base.HOME_PROJECT[] = nothing
                 Pkg.add(Pkg.PackageSpec(BugReportingId.name, BugReportingId.uuid))
                 BugReporting = Base.require(BugReportingId)
-                Base.ACTIVE_PROJECT[] = prev_active
+                append!(empty!(LOAD_PATH), old_load_path)
+                Base.HOME_PROJECT[] = old_home_project
             end
         end
     else
diff --git a/stdlib/LinearAlgebra/src/triangular.jl b/stdlib/LinearAlgebra/src/triangular.jl
index 73a861358022b..106443a0df648 100644
--- a/stdlib/LinearAlgebra/src/triangular.jl
+++ b/stdlib/LinearAlgebra/src/triangular.jl
@@ -2607,7 +2607,9 @@ function sqrt(A::UpperTriangular{T},::Val{realmatrix}) where {T,realmatrix}
             @simd for k = i+1:j-1
                 r -= R[i,k]*R[k,j]
             end
-            iszero(r) || (R[i,j] = sylvester(R[i,i],R[j,j],-r))
+            if !(iszero(r) || (iszero(R[i,i]) && iszero(R[j,j])))
+                R[i,j] = sylvester(R[i,i],R[j,j],-r)
+            end
         end
     end
     return UpperTriangular(R)
diff --git a/stdlib/LinearAlgebra/test/triangular.jl b/stdlib/LinearAlgebra/test/triangular.jl
index ca76408e9711f..cee96ba9f7266 100644
--- a/stdlib/LinearAlgebra/test/triangular.jl
+++ b/stdlib/LinearAlgebra/test/triangular.jl
@@ -651,4 +651,9 @@ end
     @test_throws ArgumentError LinearAlgebra.powm(A, 2.2)
 end
 
+# Issue 35058
+let A = [0.9999999999999998 4.649058915617843e-16 -1.3149405273715513e-16 9.9959579317056e-17; -8.326672684688674e-16 1.0000000000000004 2.9280733590254494e-16 -2.9993900031619594e-16; 9.43689570931383e-16 -1.339206523454095e-15 1.0000000000000007 -8.550505126287743e-16; -6.245004513516506e-16 -2.0122792321330962e-16 1.183061278035052e-16 1.0000000000000002],
+    B = [0.09648289218436859 0.023497875751503007 0.0 0.0; 0.023497875751503007 0.045787575150300804 0.0 0.0; 0.0 0.0 0.0 0.0; 0.0 0.0 0.0 0.0]
+    @test sqrt(A*B*A')^2 ≈ A*B*A'
+end
 end # module TestTriangular
diff --git a/stdlib/Pkg.version b/stdlib/Pkg.version
index c09afdea66988..cab9544700174 100644
--- a/stdlib/Pkg.version
+++ b/stdlib/Pkg.version
@@ -1,2 +1,2 @@
 PKG_BRANCH = master
-PKG_SHA1 = eb3726d8f9c68bb91707a5c0e9809c95f1c1eee7
+PKG_SHA1 = fff698d3d7d90a55431ad2f4fa0af9719d899954
diff --git a/stdlib/Statistics.version b/stdlib/Statistics.version
index 71bbce98ed9c2..7cfb1ca67170b 100644
--- a/stdlib/Statistics.version
+++ b/stdlib/Statistics.version
@@ -1,2 +1,2 @@
 STATISTICS_BRANCH = master
-STATISTICS_SHA1 = a87c385b812e6576be984cae96beae64252214f0
+STATISTICS_SHA1 = 42f46093985058665b085f24001882f3f33a400c
diff --git a/test/abstractarray.jl b/test/abstractarray.jl
index 59c2c573849e6..f7018fe29d6b4 100644
--- a/test/abstractarray.jl
+++ b/test/abstractarray.jl
@@ -937,3 +937,40 @@ end
 @testset "vcat with mixed elements" begin
     @test vcat(Nothing[], [missing], [1.0], [Int8(1)]) isa Vector{Union{Missing, Nothing, Float64}}
 end
+
+@testset "sizeof" begin
+    let arrUInt8 = zeros(UInt8, 10)
+        @test sizeof(arrUInt8) == 10
+        @test Core.sizeof(arrUInt8) == 10
+    end
+
+    let arrUInt32 = zeros(UInt32, 10)
+        @test sizeof(arrUInt32) == 40
+        @test Core.sizeof(arrUInt32) == 40
+    end
+
+    let arrFloat64 = zeros(Float64, 10, 10)
+        @test sizeof(arrFloat64) == 800
+        @test Core.sizeof(arrFloat64) == 800
+    end
+
+    # Test union arrays (Issue #23321)
+    let arrUnion = Union{Int64, Cvoid}[rand(Bool) ? k : nothing for k = 1:10]
+        @test sizeof(arrUnion) == 80
+        @test Core.sizeof(arrUnion) == 80
+    end
+
+    # Test non-power of 2 types (Issue #35884)
+    primitive type UInt48 48 end
+    UInt48(x::UInt64) = Core.Intrinsics.trunc_int(UInt48, x)
+    UInt48(x::UInt32) = Core.Intrinsics.zext_int(UInt48, x)
+
+    a = UInt48(0x00000001);
+    b = UInt48(0x00000002);
+    c = UInt48(0x00000003);
+    let arrayOfUInt48 = [a, b, c]
+        f35884(x) = sizeof(x)
+        @test f35884(arrayOfUInt48) == 24
+        @test Core.sizeof(arrayOfUInt48) == 24
+    end
+end
diff --git a/test/core.jl b/test/core.jl
index da814873820fd..98344bfb44506 100644
--- a/test/core.jl
+++ b/test/core.jl
@@ -5961,6 +5961,16 @@ let a33709 = A33709(A33709(nothing))
     @test isnothing(a33709.a.a)
 end
 
+# issue #35793
+struct A35793
+    x::Union{Nothing, Missing}
+end
+let x = A35793(nothing), y = A35793(missing)
+    @test x isa A35793
+    @test x.x === nothing
+    @test y.x === missing
+end
+
 # issue 31583
 a31583 = "a"
 f31583() = a31583 === "a"
diff --git a/test/dict.jl b/test/dict.jl
index 541bc3b50f84d..5f2fc6aa0aef4 100644
--- a/test/dict.jl
+++ b/test/dict.jl
@@ -722,7 +722,8 @@ import Base.ImmutableDict
     v = [k1 => v1, k2 => v2]
     d5 = ImmutableDict(v...)
     @test d5 == d2
-    @test collect(d5) == v
+    @test reverse(collect(d5)) == v
+    @test ImmutableDict(:a => 1, :a => 2)[:a] == 2
 
     @test !haskey(ImmutableDict(-0.0=>1), 0.0)
 end
@@ -841,6 +842,7 @@ Dict(1 => rand(2,3), 'c' => "asdf") # just make sure this does not trigger a dep
     @test isa(WeakKeyDict(A=>2, B=>3, C=>4), WeakKeyDict{Array{Int,1},Int})
     @test WeakKeyDict(a=>i+1 for (i,a) in enumerate([A,B,C]) ) == wkd
     @test WeakKeyDict([(A,2), (B,3), (C,4)]) == wkd
+    @test WeakKeyDict{typeof(A), Int64}(Pair(A,2), Pair(B,3), Pair(C,4)) == wkd
     @test WeakKeyDict(Pair(A,2), Pair(B,3), Pair(C,4)) == wkd
     @test isa(WeakKeyDict(Pair(A,2), Pair(B,3.0), Pair(C,4)), WeakKeyDict{Array{Int,1},Any})
     @test isa(WeakKeyDict(Pair(convert(Vector{Number}, A),2), Pair(B,3), Pair(C,4)), WeakKeyDict{Any,Int})
diff --git a/test/reduce.jl b/test/reduce.jl
index 69b8b1911e7ea..9501f41f8b77c 100644
--- a/test/reduce.jl
+++ b/test/reduce.jl
@@ -46,6 +46,8 @@ end
 @test reduce(max, [8 6 7 5 3 0 9]) == 9
 @test reduce(+, 1:5; init=1000) == (1000 + 1 + 2 + 3 + 4 + 5)
 @test reduce(+, 1) == 1
+@test_throws ArgumentError reduce(*, ())
+@test_throws ArgumentError reduce(*, Union{}[])
 
 # mapreduce
 @test mapreduce(-, +, [-10 -9 -3]) == ((10 + 9) + 3)
@@ -133,6 +135,7 @@ fz = float(z)
 @test sum(z) === 136
 @test sum(fz) === 136.0
 
+@test_throws ArgumentError sum(Union{}[])
 @test_throws ArgumentError sum(sin, Int[])
 @test sum(sin, 3) == sin(3.0)
 @test sum(sin, [3]) == sin(3.0)
diff --git a/test/subarray.jl b/test/subarray.jl
index f9e48a75612e5..6f643546a56ea 100644
--- a/test/subarray.jl
+++ b/test/subarray.jl
@@ -589,6 +589,18 @@ end
     @test sizeof(view(zeros(UInt8, 10), 1:4)) == 4
     @test sizeof(view(zeros(UInt8, 10), 1:3)) == 3
     @test sizeof(view(zeros(Float64, 10, 10), 1:3, 2:6)) == 120
+
+    # Test non-power of 2 types (Issue #35884)
+    primitive type UInt48 48 end
+    UInt48(x::UInt64) = Core.Intrinsics.trunc_int(UInt48, x)
+    UInt48(x::UInt32) = Core.Intrinsics.zext_int(UInt48, x)
+
+    a = UInt48(0x00000001);
+    b = UInt48(0x00000002);
+    c = UInt48(0x00000003);
+    arrayOfUInt48 = [a, b, c];
+
+    @test sizeof(view(arrayOfUInt48, 1:2)) == 16
 end