Checking patch manual/signal.texi...
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@deftypevr Macro int  SIGSYS
@standards{Unix, signal.h}
Bad system call; that is to say, the instruction to trap to the
operating system was executed, but the code number for the system call
to perform was invalid.
@end deftypevr

@node Termination Signals
@subsection Termination Signals
@cindex program termination signals

error: patch failed: manual/signal.texi:427
error: manual/signal.texi: patch does not apply