[llvm-dev] Error-Running pass 'Function Pass Manager' on module

[cszide via llvm-dev]

Hi, everyone, 
I use opt to optimize some .bc files, but in some cases, when I use a costume passes sequence, I get the following error
1.Running pass 'Function Pass Manager' on module 'xx.bc'.
2.Running pass 'Value Propagation' on function '@yy'
Segmentation fault (core dumped)


What are the reasons of this error? From the output text, I know that opt runs pass 'Function Pass Manager' on module, which is not correct, but I cannot find the reason.
Or there are some cautions that I need to know when I define the passes sequence by myself?
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