New issue 2775: crash when building numpy
https://bitbucket.org/pypy/pypy/issues/2775/crash-when-building-numpy
mattip:
Since build ``93883-89245c285fa0`` building numpy produces the following assert
error:
```
RPython traceback:
File "rpython_jit_metainterp_4.c", line 40838, in MIFrame_run_one_step
File "rpython_jit_metainterp_6.c", line 55508, in
handler_getfield_gc_r_greenfield_1
File "rpython_jit_metainterp_7.c", line 52040, in
MIFrame__opimpl_getfield_gc_greenfield_any
File "rpython_jit_metainterp_8.c", line 42545, in
MIFrame__nonstandard_virtualizable
File "rpython_jit_metainterp_9.c", line 48872, in
MIFrame_emit_force_virtualizable
Fatal RPython error: AssertionError
```
version ``93876-2ec2d28bba33`` does not fail. To replicate, on a fresh build or
a ``tar.gz`` download:
```
pypy -mensurepip
pypy -mpip install cython numpy
It seems the commit in 57349ce40416 somehow reliably triggers the JIT assert
```
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