Hello.

i just tried to compile cbor.d (see announce NG) and found this issue:

# dmd z00.d cbor.d

(z00.d is just a copypasted sample from README.md)

z00.o: In function 'pure nothrow @nogc @safe void cbor.putChecked!(ubyte[], 
ubyte).putChecked(ref ubyte[], const(ubyte))':
cbor.d:(.text._D4cbor21__T10putCheckedTAhThZ10putCheckedFNaNbNiNfKAhxhZv+0xa): 
undefined reference to 'pure nothrow @nogc @safe void 
std.range.primitives.put!(ubyte[], const(ubyte)).put(ref ubyte[], const(ubyte))'
z00.o: In function 
`_D4cbor22__T10putCheckedTAhTAhZ10putCheckedFNaNbNiNfKAhxAhZv':
cbor.d:(.text._D4cbor22__T10putCheckedTAhTAhZ10putCheckedFNaNbNiNfKAhxAhZv+0xd):
 undefined reference to 'pure nothrow @nogc @safe void 
std.range.primitives.put!(ubyte[], const(ubyte)[]).put(ref ubyte[], 
const(ubyte)[])'
z00.o: In function 
`_D4cbor22__T10putCheckedTAhTAhZ10putCheckedFNaNbNiNfKAhKxAhZv':
cbor.d:(.text._D4cbor22__T10putCheckedTAhTAhZ10putCheckedFNaNbNiNfKAhKxAhZv+0xf):
 undefined reference to 'pure nothrow @nogc @safe void 
std.range.primitives.put!(ubyte[], const(ubyte)[]).put(ref ubyte[], 
const(ubyte)[])'

sorry for the linenoise, but i think it is decipherable. i demangled
names for clarity.

seems that dmd somehow decides that `cbor.putChecked` is pure, and
couldn't find pure `put` for ranges (which is obvious; what use of pure
`put` can be? ;-).

but if i do this:

# dmd -c cbor.d
# dmd z00.d cbor.o

everything is fine and i got working `z00` binary.

i tried to dustmite that, but got complete garbage (as dustmite loves
to produce ;-). seems that this is a bug in attributes inference, but i
unable to minify it to something sane. maybe somebody brave enough can
write a sane sample which triggers this bug?


system: dmd from git head without any custom patches, GNU/Linux, x86.

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