--- a/ExternalLibraryFunction.st Thu Apr 11 07:30:32 2019 +0200
+++ b/ExternalLibraryFunction.st Thu Apr 11 08:54:15 2019 +0200
@@ -3019,7 +3019,8 @@
^ self primitiveFailed:'FFI support missing in this build'.
].
(failureCode == #InvalidArgument) ifTrue:[
- ^ self primitiveFailed:('cannot convert argument: #%1' bindWith:failureArgNr).
+ ^ self primitiveFailed:('cannot convert argument: #%1 (to %2)'
+ bindWith:failureArgNr with:(argTypeSymbols at:failureArgNr)).
].
(failureCode == #UnknownReturnType) ifTrue:[
^ self primitiveFailed:('unknown return type: #%1' bindWith:returnTypeSymbol).