所有
我有一个用NetBeans开发的开源java8项目（所以它基本上是ANT，我假设）。它在命令行（使用ant test）和IDE中都可以很好地构建。 Travis-ci的构建失败，声称缺少一种方法：
[javac] Compiling 116 source files to /home/travis/build/IQSS/DataTaggingLibrary/DataTagsLib/build/classes
[javac] /home/travis/build/IQSS/DataTaggingLibrary/DataTagsLib/src/edu/harvard/iq/datatags/parser/tagspace/TagSpaceParseResult.java:58: error: no suitable method found for collect(Collector<AbstractSlot,CAP#1,Map<String,List<AbstractSlot>>>)
[javac] Map<String, List<AbstractSlot>> slotMap = slots.stream().collect(Collectors.groupingBy(AbstractSlot::getName));
[javac] ^
[javac] method Stream.<R#1>collect(Supplier<R#1>,BiConsumer<R#1,? super CAP#2>,BiConsumer<R#1,R#1>) is not applicable
[javac] (cannot infer type-variable(s) R#1
[javac] (actual and formal argument lists differ in length))
[javac] method Stream.<R#2,A>collect(Collector<? super CAP#2,A,R#2>) is not applicable
[javac] (cannot infer type-variable(s) R#2,A,CAP#3,T#2,K
[javac] (argument mismatch; Collector<CAP#2,CAP#4,Map<String,List<CAP#2>>> cannot be converted to Collector<? super CAP#2,CAP#4,Map<String,List<CAP#2>>>))
[javac] where R#1,T#1,R#2,A,T#2,K are type-variables:
[javac] R#1 extends Object declared in method <R#1>collect(Supplier<R#1>,BiConsumer<R#1,? super T#1>,BiConsumer<R#1,R#1>)
[javac] T#1 extends Object declared in interface Stream
[javac] R#2 extends Object declared in method <R#2,A>collect(Collector<? super T#1,A,R#2>)
[javac] A extends Object declared in method <R#2,A>collect(Collector<? super T#1,A,R#2>)
[javac] T#2 extends Object declared in method <T#2,K>groupingBy(Function<? super T#2,? extends K>)
[javac] K extends Object declared in method <T#2,K>groupingBy(Function<? super T#2,? extends K>)
[javac] where CAP#1,CAP#2,CAP#3,CAP#4 are fresh type-variables:
[javac] CAP#1 extends Object from capture of ?
[javac] CAP#2 extends AbstractSlot from capture of ? extends AbstractSlot
[javac] CAP#3 extends Object from capture of ?
[javac] CAP#4 extends Object from capture of ?
这里是.travis.yml：
sudo: false
language: java
jdk:
- oraclejdk8
before_script: cd DataTagsLib
script: ant jar test
有什么想法吗？