Sorry for the cheap bug report, but on GWT master, the innocent looking:
final List<String> f = newArrayList();
f.sort((a, b) -> a.compareTo(b));
Will result in a compiler NPE:
Caused by: java.lang.NullPointerException
at com.google.gwt.dev.jjs.ast.JMethod.getJsniSignature(JMethod.java:518)
at
com.google.gwt.dev.jjs.impl.ControlFlowRecorder.computeName(ControlFlowRecorder.java:49)
at
com.google.gwt.dev.jjs.impl.ControlFlowRecorder.processMethodCall(ControlFlowRecorder.java:197)
at
com.google.gwt.dev.jjs.impl.ControlFlowRecorder.visit(ControlFlowRecorder.java:151)
at com.google.gwt.dev.jjs.ast.JMethodCall.traverse(JMethodCall.java:248)
at com.google.gwt.dev.jjs.ast.JVisitor.accept(JVisitor.java:127)
I get the root cause is that List.sort is a new JDK8 method that is not
implemented, which is fine, I’ll use Collections.sort and everything is
fine, but I was just surprised to see the compiler actually stack trace vs.
fail with a nicer compiler error.
Feel free to ignore this if this really is expected/unavoidable; admittedly
I don’t know what the previous behavior was in this situation of a
super-sourced class missing a method.
- Stephen
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