sjavac always compiled?

[Alan Bateman]

There was a sjavac update pushed to jdk9/dev yesterday (JDK-8054717). I 
seem to be running into build issues on OS X since then (clean build, 
not a reconfigure). My boot JDK is 8u31. My configure command does not 
specify --enable-sjavac so I'm surprised this code is being compiled.

Anyone else seeing this?

-Alan

Building target 'default' in configuration 
'macosx-x86_64-normal-server-release'
Compiling 830 files for BUILD_INTERIM_LANGTOOLS
/ws/jdk9-dev/langtools/src/jdk.compiler/share/classes/com/sun/tools/sjavac/Util.java:231: 
error: no suitable method found for collect(Collector<T#1,CAP#1,Map<I,T#1>>)
         return c.stream().collect(Collectors.toMap(indexFunction, o -> o));
                          ^
     method Stream.<R#1>collect(Supplier<R#1>,BiConsumer<R#1,? super 
CAP#2>,BiConsumer<R#1,R#1>) is not applicable
       (cannot infer type-variable(s) R#1
         (actual and formal argument lists differ in length))
     method Stream.<R#2,A>collect(Collector<? super CAP#2,A,R#2>) is not 
applicable
       (cannot infer type-variable(s) R#2,A,CAP#3,T#3,K,U
         (argument mismatch; Collector<CAP#2,CAP#4,Map<I,Object>> cannot 
be converted to Collector<? super CAP#2,CAP#4,Map<I,Object>>))
   where T#1,I,R#1,T#2,R#2,A,T#3,K,U are type-variables:
     T#1 extends Object declared in method <I,T#1>indexBy(Collection<? 
extends T#1>,Function<? super T#1,? extends I>)
     I extends Object declared in method <I,T#1>indexBy(Collection<? 
extends T#1>,Function<? super T#1,? extends I>)
     R#1 extends Object declared in method 
<R#1>collect(Supplier<R#1>,BiConsumer<R#1,? super T#2>,BiConsumer<R#1,R#1>)
     T#2 extends Object declared in interface Stream
     R#2 extends Object declared in method <R#2,A>collect(Collector<? 
super T#2,A,R#2>)
     A extends Object declared in method <R#2,A>collect(Collector<? 
super T#2,A,R#2>)
     T#3 extends Object declared in method <T#3,K,U>toMap(Function<? 
super T#3,? extends K>,Function<? super T#3,? extends U>)
     K extends Object declared in method <T#3,K,U>toMap(Function<? super 
T#3,? extends K>,Function<? super T#3,? extends U>)
     U extends Object declared in method <T#3,K,U>toMap(Function<? super 
T#3,? extends K>,Function<? super T#3,? extends U>)
   where CAP#1,CAP#2,CAP#3,CAP#4 are fresh type-variables:
     CAP#1 extends Object from capture of ?
     CAP#2 extends T#1 from capture of ? extends T#1
     CAP#3 extends Object from capture of ?
     CAP#4 extends Object from capture of ?
1 error