[pypy-issue] Issue #1990: patch_jump_for_descr assertion failure (pypy/pypy)

[Carl Friedrich Bolz]

New issue 1990: patch_jump_for_descr assertion failure
https://bitbucket.org/pypy/pypy/issue/1990/patch_jump_for_descr-assertion-failure

Carl Friedrich Bolz:

Assertion failure in ``patch_jump_for_descr``:


```
RPython traceback:
  File "rpython_jit_metainterp_compile.c", line 17761, in send_bridge_to_backend
  File "rpython_jit_backend_x86_assembler.c", line 62107, in Assembler386_assemble_bridge
  File "rpython_jit_backend_x86_assembler.c", line 62778, in Assembler386_patch_jump_for_descr
Fatal RPython error: AssertionError
```

It's this assert:


```
#!python

    def patch_jump_for_descr(self, faildescr, adr_new_target):
        adr_jump_offset = faildescr.adr_jump_offset
        assert adr_jump_offset != 0
```

Way to reproduce:
* clone and build pycket https://github.com/samth/pycket
* clone the benchmarks: https://github.com/krono/pycket-bench/
* go to pycket-bench/Crossbenchmarks and run pycket-c racket/dynamic-nothing.rkt