Fix build issues manifesting in our controlled build environment

eth/p2p/discoveryv5/protocol.nim

@@ -1,5 +1,8 @@
-import tables, sets, endians, options, math
-import types, encoding, node, routing_table, eth/[rlp, keys], chronicles, chronos, ../enode, stint, enr, byteutils
+import
+  tables, sets, endians, options, math,
+  stew/byteutils, eth/[rlp, keys], chronicles, chronos, stint,
+  ../enode, types, encoding, node, routing_table, enr
+
 import nimcrypto except toHex
 
 type

eth/p2p/discoveryv5/types.nim

@@ -14,6 +14,11 @@ type
   Database* = ref object of RootRef
 
   PacketKind* = enum
+    # TODO This is needed only to make Nim 1.0.4 happy
+    #      Without it, the `PacketKind` type cannot be used as
+    #      a discriminator in case objects.
+    unused = 0x00
+
     ping = 0x01
     pong = 0x02
     findnode = 0x03

eth/rlp.nim

@@ -61,7 +61,7 @@ proc rlpFromHex*(input: string): Rlp =
 proc hasData*(self: Rlp): bool =
   position < bytes.len
 
-proc currentElemEnd(self: Rlp): int {.gcsafe.}
+proc currentElemEnd*(self: Rlp): int {.gcsafe.}
 
 proc rawData*(self: Rlp): BytesRange =
   return self.bytes[position ..< self.currentElemEnd]
@@ -233,7 +233,7 @@ proc toBytes*(self: Rlp): BytesRange =
 
     result = bytes.slice(ibegin, iend)
 
-proc currentElemEnd(self: Rlp): int =
+proc currentElemEnd*(self: Rlp): int =
   doAssert hasData()
   result = position