diff --git a/corral/bundle/json.pony b/corral/bundle/json.pony
index 8b9fc041..e4e1366c 100644
--- a/corral/bundle/json.pony
+++ b/corral/bundle/json.pony
@@ -14,7 +14,11 @@ primitive Json
     | let e: FileErrNo => return e
     end
     let content: String = file.read_string(file.size())
-    //log.fine("Read: " + content + ".")
+    if file.errno() isnt FileOK then
+      log.err("Read File Error: ")
+      return JsonError
+    end
+    log.fine("Read: " + content + ". Size: " +file.size().string())
     let json: JsonDoc ref = JsonDoc
     try
       json.parse(content)?
diff --git a/corral/semver/utils/strings.pony b/corral/semver/utils/strings.pony
index 31c8782f..4e02a146 100644
--- a/corral/semver/utils/strings.pony
+++ b/corral/semver/utils/strings.pony
@@ -1,8 +1,8 @@
 use "collections"
 
 primitive Strings
-  fun contains_only(s: String, bytes: Set[U8]): Bool =>
-    for byte in s.values() do
-      if (not bytes.contains(byte)) then return false end
+  fun contains_only(s: String, codepoints: Set[U32]): Bool =>
+    for codepoint in s.values() do
+      if (not codepoints.contains(codepoint)) then return false end
     end
-    true
\ No newline at end of file
+    true
diff --git a/corral/semver/version/consts.pony b/corral/semver/version/consts.pony
index 07479b51..6e7b0c7a 100644
--- a/corral/semver/version/consts.pony
+++ b/corral/semver/version/consts.pony
@@ -3,14 +3,14 @@ use "collections"
 // TODO: review the ponylang discussion around constants
 //       the runtime cost here every time is silly for what are supposed to be fixed values
 primitive Consts
-  fun alphas(): Set[U8] =>
-    Set[U8].>
+  fun alphas(): Set[U32] =>
+    Set[U32].>
       union("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-".values())
 
-  fun nums(): Set[U8] =>
-    Set[U8].>union("0123456789".values())
+  fun nums(): Set[U32] =>
+    Set[U32].>union("0123456789".values())
 
-  fun alphanums(): Set[U8] =>
-    Set[U8].>
+  fun alphanums(): Set[U32] =>
+    Set[U32].>
       union(alphas().values()).>
       union(nums().values())
diff --git a/corral/util/action.pony b/corral/util/action.pony
index 54832518..12401fde 100644
--- a/corral/util/action.pony
+++ b/corral/util/action.pony
@@ -169,10 +169,10 @@ class _Collector is ProcessNotify
     None
 
   fun ref stdout(process: ProcessMonitor ref, data: Array[U8] iso) =>
-    _stdout.append(consume data)
+    _stdout.append(String.from_iso_array(consume data))
 
   fun ref stderr(process: ProcessMonitor ref, data: Array[U8] iso) =>
-    _stderr.append(consume data)
+    _stderr.append(String.from_iso_array(consume data))
 
   fun ref failed(process: ProcessMonitor ref, err: ProcessError) =>
     let cr = ActionResult.fail(err.string())