fix some problems raised by Nim 0.20.2

json_rpc/client.nim

@@ -52,7 +52,7 @@ macro checkGet(node: JsonNode, fieldName: string,
   of JObject: result.add(quote do: `n`.getObject)
   else: discard
 
-proc processMessage*(self: RpcClient, line: string) =
+proc processMessage*(self: RpcClient, line: string) {.gcsafe.} =
   # Note: this doesn't use any transport code so doesn't need to be
   # differentiated.
   let node = parseJson(line)
@@ -82,9 +82,10 @@ proc processMessage*(self: RpcClient, line: string) =
   elif "method" in node:
     # This could be subscription notification
     let name = node["method"].getStr()
-    let handler = self.methodHandlers.getOrDefault(name)
-    if not handler.isNil:
-      handler(node{"params"})
+    {.gcsafe.}:
+      let handler = self.methodHandlers.getOrDefault(name)
+      if not handler.isNil:
+        handler(node{"params"})
   else:
     raise newException(ValueError, "Invalid jsonrpc message: " & $node)
 

json_rpc/clients/httpclient.nim

@@ -172,7 +172,7 @@ proc httpMethod*(client: RpcHttpClient, m: HttpMethod) =
   client.options.httpMethod = m
 
 method call*(client: RpcHttpClient, name: string,
-           params: JsonNode): Future[Response] {.async.} =
+           params: JsonNode): Future[Response] {.async, gcsafe.} =
   ## Remotely calls the specified RPC method.
   let id = client.getNextId()
 

json_rpc/clients/websocketclient.nim

@@ -1,4 +1,4 @@
-import ../client, chronos, tables, json
+import ../client, chronos, tables, json, strtabs
 
 const newsUseChronos = true
 include news