DynamoRIO / DynamoRIO/drmemory

ASSERT FAILURE in fastpath_x86.c:821

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Description

drmemory.exe crashed with

ASSERT FAILURE (thread 2020):
d:\drmemory_package\drmemory\fastpath_x86.c:821:
mi->dst_reg == REG_NULL || reg_is_shadowed(opc, mi->dst_reg)
(reg fastpath error)new thread #8 id=3684
thread initial stack: 0x07a20000-0x07b1e000-0x07b20000, TOS=0x07b1ff20

![drmemory](https://cloud.githubusercontent.com/assets/21068285/17716746/ff92ec08-63d7-11e6-8071-782ecbeb5fee.png)

The program being run during the crashed session uses the "Pegasus ImagXpress Control v7.0" ActiveX control in a custom ActiveX container.

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