fix stack overflow for .*

Author: stevengj

base/sparse/sparsematrix.jl

@@ -1783,7 +1783,9 @@ broadcast(::typeof(-), A::SparseMatrixCSC, B::Number) = full(A) .- B
 broadcast(::typeof(-), A::Number, B::SparseMatrixCSC) = A .- full(B)
 (-)(A::Array , B::SparseMatrixCSC) = A  - full(B)
 
-broadcast(::typeof(*), A::AbstractArray, B::AbstractArray) = broadcast_zpreserving(*, A, B)
+broadcast(::typeof(*), A::SparseMatrixCSC, B::SparseMatrixCSC) = broadcast_zpreserving(*, A, B)
+broadcast(::typeof(*), A::SparseMatrixCSC, B::Union{Array,BitArray}) = broadcast_zpreserving(*, A, B)
+broadcast(::typeof(*), A::Union{Array,BitArray}, B::SparseMatrixCSC) = broadcast_zpreserving(*, A, B)
 broadcast(::typeof(*), A::SparseMatrixCSC, B::Number) = SparseMatrixCSC(A.m, A.n, copy(A.colptr), copy(A.rowval), A.nzval .* B)
 broadcast(::typeof(*), A::Number, B::SparseMatrixCSC) = SparseMatrixCSC(B.m, B.n, copy(B.colptr), copy(B.rowval), A .* B.nzval)
 

test/broadcast.jl

@@ -297,6 +297,9 @@ import Base.Meta: isexpr
 @test isexpr(expand(:(f.(x,1.0))), :thunk)
 @test isexpr(expand(:(f.(x,$π))), :thunk)
 
+# PR #17623: Fused binary operators
+@test [true] .* [true] == [true]
+
 # PR 16988
 @test Base.promote_op(+, Bool) === Int
 @test isa(broadcast(+, [true]), Array{Int,1})