error::pass1 - systemtap pass-1 errors
Errors that occur during pass 1 (parsing) usually mean a basic syntax
error of some sort occurred in the systemtap script. There are several
classes of problems possible:
plain syntax error
The systemtap script parser detects a large variety of errors,
such as missing operands, bad punctuation. It tries to list
what kinds of tokens it was expecting to see, and will show the
region of the source code with the problem. Please review the
stap(1) man page and/or the tutorial, to correct the script's
There is at least one known ambiguity in the systemtap grammar.
It relates to the optionality of ; (semicolon) separators
between statements, and the ++ and -- increment/decrement opera‐
tors. If the parser indicates an error, consider adding some
explicit ; separators between nearby statements and try again.
missing command line arguments
A systemtap script that uses the $N and @N constructs for sub‐
stituting in command-line options may fail if not enough options
were given on the stap command line.
Some versions of systemtap have changed the language incompati‐
bly, for example by adding the try/catch keywords for exception
handling. In such cases, rerun systemtap with the --compatibil‐
ity=VERSION option, substituting the last systemtap version
where your script was known to work. You may also check the
release-history NEWS file for compatibility changes.
Increasing the verbosity of pass-1 with an option such as --vp 1 can
help pinpoint the problem.