Fix errors on 1.7

README.md

@@ -1,6 +1,6 @@
 # BSON
 
-[![Build Status](https://travis-ci.org/JuliaIO/BSON.jl.svg?branch=master)](https://travis-ci.org/JuliaIO/BSON.jl)
+[![CI](https://github.com/JuliaIO/BSON.jl/actions/workflows/ci.yml/badge.svg)](https://github.com/JuliaIO/BSON.jl/actions/workflows/ci.yml)
 
 BSON.jl is a Julia package for working with the [Binary JSON](http://bsonspec.org/) serialisation format. It can be used as a general store for Julia data structures, with the following features:
 

src/BSON.jl

@@ -3,8 +3,6 @@ module BSON
 using Core: SimpleVector, TypeName
 export bson
 
-using Core: SimpleVector, TypeName
-
 const BSONDict = Dict{Symbol,Any}
 const BSONArray = Vector{Any}
 const Primitive = Union{Nothing,Bool,Int32,Int64,Float64,String,Vector{UInt8},BSONDict,BSONArray}

src/anonymous.jl

@@ -60,6 +60,9 @@ function newstruct!(meth::Method, mod, name, file, line, sig,
 end
 end
 
+# Type Names
+
+if VERSION < v"1.7-"
 function structdata(t::TypeName)
   primary = Base.unwrap_unionall(t.wrapper)
   mt = !isdefined(t, :mt) ? nothing :
@@ -69,11 +72,27 @@ function structdata(t::TypeName)
    primary.types, isdefined(primary, :instance), isabstracttype(primary),
    ismutabletype(primary), primary.ninitialized, mt]
 end
+else
+# see https://github.com/JuliaLang/julia/pull/41018 for changes
+function structdata(t::TypeName)
+  primary = Base.unwrap_unionall(t.wrapper)
+  mt = !isdefined(t, :mt) ? nothing :
+    [t.mt.name, collect(Base.MethodList(t.mt)), t.mt.max_args,
+      isdefined(t.mt, :kwsorter) ? t.mt.kwsorter : nothing]
+  [Base.string(VERSION), t.name, t.names, primary.super, primary.parameters,
+    primary.types, isdefined(primary, :instance), t.atomicfields, isabstracttype(primary),
+    ismutable(primary), Core.Compiler.datatype_min_ninitialized(primary), mt]
+end
+end
 
-# Type Names
+if VERSION >= v"1.7-"
+structdata(x::Core.TypeofVararg) =
+  Any[getfield(x, f) for f in fieldnames(typeof(x)) if isdefined(x, f)]
+end
 
 baremodule __deserialized_types__ end
 
+if VERSION < v"1.7-"
 function newstruct_raw(cache, ::Type{TypeName}, d, init)
   name = raise_recursive(d[:data][2], cache, init)
   name = isdefined(__deserialized_types__, name) ? gensym() : name
@@ -105,6 +124,39 @@ function newstruct_raw(cache, ::Type{TypeName}, d, init)
   end
   return tn
 end
+else
+function newstruct_raw(cache, ::Type{TypeName}, d, init)
+  name = raise_recursive(d[:data][2], cache, init)
+  name = isdefined(__deserialized_types__, name) ? gensym() : name
+  tn = ccall(:jl_new_typename_in, Ref{Core.TypeName}, (Any, Any),
+             name, __deserialized_types__)
+  cache[d] = tn
+  names, super, parameters, types, has_instance, atomicfields,
+    abstr, mutabl, ninitialized = map(x -> raise_recursive(x, cache, init), d[:data][3:end-1])
+  tn.names = names
+  ndt = ccall(:jl_new_datatype, Any, (Any, Any, Any, Any, Any, Any, Any, Cint, Cint, Cint),
+              tn, tn.module, super, parameters, names, types, atomicfields,
+              abstr, mutabl, ninitialized)
+  ty = tn.wrapper = ndt.name.wrapper
+  ccall(:jl_set_const, Cvoid, (Any, Any, Any), tn.module, tn.name, ty)
+  if has_instance && !isdefined(ty, :instance)
+    # use setfield! directly to avoid `fieldtype` lowering expecting to see a Singleton object already on ty
+    Core.setfield!(ty, :instance, ccall(:jl_new_struct, Any, (Any, Any...), ty))
+  end
+  mt = raise_recursive(d[:data][end], cache, init)
+  if mt != nothing
+    mtname, defs, maxa, kwsorter = mt
+    tn.mt = ccall(:jl_new_method_table, Any, (Any, Any), name, tn.module)
+    tn.mt.name = mtname
+    tn.mt.max_args = maxa
+    for def in defs
+      isdefined(def, :sig) || continue
+      ccall(:jl_method_table_insert, Cvoid, (Any, Any, Ptr{Cvoid}), tn.mt, def, C_NULL)
+    end
+  end
+  return tn
+end
+end
 
 # Function Types
 

src/extensions.jl

@@ -110,6 +110,7 @@ function newstruct!(x, fs...)
   return x
 end
 
+if VERSION < v"1.7-"
 function newstruct(T, xs...)
   if !ismutabletype(T)
     flds = Any[convert(fieldtype(T, i), x) for (i,x) in enumerate(xs)]
@@ -127,6 +128,25 @@ function newstruct(T, xs...)
 
   end
 end
+else
+function newstruct(T, xs...)
+  if !ismutabletype(T)
+    flds = Any[convert(fieldtype(T, i), x) for (i,x) in enumerate(xs)]
+    return ccall(:jl_new_structv, Any, (Any,Ptr{Cvoid},UInt32), T, flds, length(flds))
+  else
+    # Manual inline of newstruct! to work around bug
+    # https://github.com/MikeInnes/BSON.jl/issues/2#issuecomment-452204339
+    x = initstruct(T)
+
+    for (i, f) = enumerate(xs)
+      f = convert(fieldtype(typeof(x),i), f)
+      ccall(:jl_set_nth_field, Nothing, (Any, Csize_t, Any), x, i-1, f)
+    end
+    x
+
+  end
+end
+end
 
 function newstruct_raw(cache, T, d, init)
   x = cache[d] = initstruct(T)

src/write.jl

@@ -43,7 +43,11 @@ lower(x::Primitive) = x
 
 import Base: RefValue
 
+if VERSION < v"1.7-"
+ismutable(T) = !isa(T, DataType) || T.mutable
+else
 ismutable(T) = !isa(T, DataType) || ismutabletype(T)
+end
 ismutable(::Type{String}) = false
 
 typeof_(x) = typeof(x)

test/runtests.jl

@@ -34,6 +34,12 @@ module A
   bson("test_25_dataframe.bson", Dict(:d=>d))
 end
 
+struct NoInit
+  x::Int
+
+  NoInit() = new()
+end
+
 @testset "BSON" begin
 
 @testset "Primitive Types" begin
@@ -101,21 +107,32 @@ end
   @test x.x === x
 end
 
+@testset "Undefined References" begin
+  # from Issue #3
+  d = Dict(:a => 1, :b => Dict(:c => 3, :d => Dict("e" => 5)))
+  @test roundtrip_equal(d)
+
+  # from Issue #43
+  x = Array{String, 1}(undef, 5)
+  x[1] = "a"
+  x[4] = "d"
+  @test_broken roundtrip_equal(Dict(:x => x))
+
+  x = NoInit()
+  @test roundtrip_equal(x)
+end
+
 @testset "Anonymous Functions" begin
   f = x -> x+1
-  if VERSION < v"1.7-"
-    f2 = BSON.roundtrip(f)
-    @test f2(5) == f(5)
-    @test typeof(f2) !== typeof(f)
-
-    chicken_tikka_masala(y) = x -> x+y
-    f = chicken_tikka_masala(5)
-    f2 = BSON.roundtrip(f)
-    @test f2(6) == f(6)
-    @test typeof(f2) !== typeof(f)
-  else
-    @test_throws ErrorException f2 = BSON.roundtrip(f)
-  end
+  f2 = BSON.roundtrip(f)
+  @test f2(5) == f(5)
+  @test typeof(f2) !== typeof(f)
+
+  chicken_tikka_masala(y) = x -> x+y
+  f = chicken_tikka_masala(5)
+  f2 = BSON.roundtrip(f)
+  @test f2(6) == f(6)
+  @test typeof(f2) !== typeof(f)
 end
 
 @testset "Int Literals in Type Params #41" begin