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  1. JDK
  2. JDK-8275330

C2: assert(n->is_Root() || n->is_Region() || n->is_Phi() || n->is_MachMerge() || def_block->dominates(block)) failed: uses must be dominated by definitions

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      b26

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        (synopsis is provisional, feel free to change it)

        The attached Fuzzer test fails like:

        $ ../build/linux-x86_64-server-fastdebug/images/jdk/bin/java -Xmx512m -XX:+UnlockDiagnosticVMOptions -Xcomp -XX:CompileOnly=Test -XX:-TieredCompilation Test

        # Internal Error (/home/shade/trunks/jdk/src/hotspot/share/opto/block.cpp:1252), pid=956055, tid=956068
        # assert(n->is_Root() || n->is_Region() || n->is_Phi() || n->is_MachMerge() || def_block->dominates(block)) failed: uses must be dominated by definitions

        Bisection points to JDK-8272562 as the starting point.

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                Assignee:
                roland Roland Westrelin
                Reporter:
                shade Aleksey Shipilev
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