This seems to have been fixed a few hours ago:
   http://hg.openjdk.java.net/jdk/jdk/rev/4d421888ad63

On 19/07/2019 13:12, Jaikiran Pai wrote:
I just updated my local jdk workspace to the latest default branch and did:

bash configure

make clean

make images

The build keeps failing with:

ERROR: Build failed for target 'images' in configuration
'macosx-x86_64-server-release' (exit code 2)
Stopping sjavac server

=== Output from failing command(s) repeated here ===
* For target hotspot_variant-server_libjvm_objs_shenandoahSupport.o:
openjdk/jdk/src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp:3019:33:
error: operator '?:' has lower precedence than '+'; '+' will be
evaluated first [-Werror,-Wparentheses]
   return Node::hash() + _native ? 1 : 0;
          ~~~~~~~~~~~~~~~~~~~~~~ ^
openjdk/jdk/src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp:3019:33:
note: place parentheses around the '+' expression to silence this warning
   return Node::hash() + _native ? 1 : 0;
                                 ^
          (                     )
openjdk/jdk/src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp:3019:33:
note: place parentheses around the '?:' expression to evaluate it first
   return Node::hash() + _native ? 1 : 0;
                                 ^
                         (              )
1 error generated.

* All command lines available in
openjdk/jdk/build/macosx-x86_64-server-release/make-support/failure-logs.
=== End of repeated output ===


I'm on macOS 10.14.1. The last working state was a few days back, I
think last week, when my local builds were working fine. Is this an
expected error, requiring some tool upgrade? Or does this need a fix in
the cpp code?

-Jaikiran

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