build failure in Rakudo

$ perl Configure.pl 

Reading configuration information from ../../parrot_config ...
Verifying Parrot installation...

Creating Makefile ...
Cleaning up ...

You can now use 'make' to build Rakudo Perl.
After that, you can use 'make test' to run some local tests,
or 'make spectest' to check out (via svn) a copy of the Perl 6
official test suite and run its tests.

$ make
/usr/local/bin/parrot-nqp --output=src/gen/Attribute.pir --encoding=utf8 \
	    --target=pir src/metamodel/Attribute.nqp
Lexical '$/' not found
current instr.: 'parrot;NQP;Actions;_block845' pc 65892 (ext/nqp-rx/src/stage0/NQP-s0.pir:17280)
called from Sub 'parrot;NQP;Actions;variable' pc 65736 (ext/nqp-rx/src/stage0/NQP-s0.pir:17230)
called from Sub 'parrot;Regex;Cursor;!reduce' pc 975 (ext/nqp-rx/src/stage0/Regex-s0.pir:624)
called from Sub 'parrot;Regex;Cursor;!cursor_pass' pc 541 (ext/nqp-rx/src/stage0/Regex-s0.pir:340)
called from Sub 'parrot;NQP;Grammar;variable' pc 20752 (ext/nqp-rx/src/stage0/NQP-s0.pir:5522)
called from Sub 'parrot;NQP;Grammar;variable_declarator' pc 25178 (ext/nqp-rx/src/stage0/NQP-s0.pir:6590)
called from Sub 'parrot;NQP;Grammar;scoped' pc 24760 (ext/nqp-rx/src/stage0/NQP-s0.pir:6482)
called from Sub 'parrot;NQP;Grammar;scope_declarator:sym<has>' pc 24416 (ext/nqp-rx/src/stage0/NQP-s0.pir:6420)
called from Sub 'parrot;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-rx/src/stage0/Regex-s0.pir:971)
called from Sub 'parrot;NQP;Grammar;scope_declarator' pc 23694 (ext/nqp-rx/src/stage0/NQP-s0.pir:6267)
called from Sub 'parrot;NQP;Grammar;term:sym<scope_declarator>' pc 18535 (ext/nqp-rx/src/stage0/NQP-s0.pir:4940)
called from Sub 'parrot;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-rx/src/stage0/Regex-s0.pir:971)
called from Sub 'parrot;NQP;Grammar;term' pc 32677 (ext/nqp-rx/src/stage0/NQP-s0.pir:8354)
called from Sub 'parrot;HLL;Grammar;termish' pc 2350 (ext/nqp-rx/src/stage0/HLL-s0.pir:1040)
called from Sub 'parrot;HLL;Grammar;EXPR' pc 1016 (ext/nqp-rx/src/stage0/HLL-s0.pir:552)
called from Sub 'parrot;NQP;Grammar;statement' pc 6623 (ext/nqp-rx/src/stage0/NQP-s0.pir:1943)
called from Sub 'parrot;NQP;Grammar;statementlist' pc 6147 (ext/nqp-rx/src/stage0/NQP-s0.pir:1807)
called from Sub 'parrot;NQP;Grammar;comp_unit' pc 5828 (ext/nqp-rx/src/stage0/NQP-s0.pir:705)
called from Sub 'parrot;NQP;Grammar;package_def' pc 22699 (ext/nqp-rx/src/stage0/NQP-s0.pir:5981)
called from Sub 'parrot;NQP;Grammar;package_declarator:sym<class>' pc 22302 (ext/nqp-rx/src/stage0/NQP-s0.pir:5885)
called from Sub 'parrot;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-rx/src/stage0/Regex-s0.pir:971)
called from Sub 'parrot;NQP;Grammar;package_declarator' pc 21925 (ext/nqp-rx/src/stage0/NQP-s0.pir:5810)
called from Sub 'parrot;NQP;Grammar;term:sym<package_declarator>' pc 18297 (ext/nqp-rx/src/stage0/NQP-s0.pir:4880)
called from Sub 'parrot;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-rx/src/stage0/Regex-s0.pir:971)
called from Sub 'parrot;NQP;Grammar;term' pc 32677 (ext/nqp-rx/src/stage0/NQP-s0.pir:8354)
called from Sub 'parrot;HLL;Grammar;termish' pc 2350 (ext/nqp-rx/src/stage0/HLL-s0.pir:1040)
called from Sub 'parrot;HLL;Grammar;EXPR' pc 1016 (ext/nqp-rx/src/stage0/HLL-s0.pir:552)
called from Sub 'parrot;NQP;Grammar;statement' pc 6623 (ext/nqp-rx/src/stage0/NQP-s0.pir:1943)
called from Sub 'parrot;NQP;Grammar;statementlist' pc 6147 (ext/nqp-rx/src/stage0/NQP-s0.pir:1807)
called from Sub 'parrot;NQP;Grammar;comp_unit' pc 5828 (ext/nqp-rx/src/stage0/NQP-s0.pir:705)
called from Sub 'parrot;NQP;Grammar;TOP' pc 1020 (ext/nqp-rx/src/stage0/NQP-s0.pir:390)
called from Sub 'parrot;Regex;Cursor;parse' pc 282 (ext/nqp-rx/src/stage0/Regex-s0.pir:181)
called from Sub 'parrot;HLL;Compiler;parse' pc 5 (ext/nqp-rx/src/stage0/HLL-s0.pir:24)
called from Sub 'parrot;PCT;HLLCompiler;compile' pc 403 (compilers/pct/src/PCT/HLLCompiler.pir:294)
called from Sub 'parrot;PCT;HLLCompiler;eval' pc 1007 (compilers/pct/src/PCT/HLLCompiler.pir:563)
called from Sub 'parrot;PCT;HLLCompiler;evalfiles' pc 1318 (compilers/pct/src/PCT/HLLCompiler.pir:714)
called from Sub 'parrot;PCT;HLLCompiler;command_line' pc 1504 (compilers/pct/src/PCT/HLLCompiler.pir:801)
called from Sub 'parrot;NQP;Compiler;main' pc -1 ((unknown file):-1)
make: *** [src/gen/Attribute.pir] Error 1
$ git show | head -1
commit d0bf6e3077f2c3882b1a52c180bb20325c12086b
$