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regex: incorrect REG_EMPTY

I encountered an apparent bug in our regex code triggered by one of the included hostprogs (namely arch/x86/tools/relocs.c) used while cross-compiling an i386 Linux kernel.

The exact regexp in question is included in the attached STC:

$ gcc -Wall regex-test.c  && ./a
./a: empty (sub)expression

$ gcc -DPCRE -Wall regex-test.c -lpcreposix && ./a


Yaakov

Attachment: regex-test.c
Description: Text document

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