[llvm-bugs] [Bug 37047] New: libFuzzer: options leak into auto-dictionary

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37047

            Bug ID: 37047
           Summary: libFuzzer: options leak into auto-dictionary
           Product: compiler-rt
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: pdknsk at gmail.com
                CC: llvm-bugs at lists.llvm.org

I've been noticing that libFuzzer options seem to leak into new test cases.
It's noticeable during fuzzing, but particularly in the recommended dictionary.

#343087 REDUCE cov: 17773 ft: 89605 corp: 4129/5942Kb lim: 8 exec/s: 102 rss:
665Mb L: 2336/2344 MS: 3 EraseBytes-PersAutoDict-ChangeByte- DE:
"ignore_remaining_args"-

###### Recommended dictionary. ######
"cleanse_crash" # Uses: 1089
...
"handle_segv" # Uses: 514
...
"workers" # Uses: 515
...
"handle_int" # Uses: 386
...
"merge_control_file" # Uses: 431
...
"handle_fpe" # Uses: 335
...
"use_value_profile" # Uses: 338
"use_feature_frequency" # Uses: 353
...
"use_memmem" # Uses: 283
...
###### End of recommended dictionary. ######

And that's not just a display quirk. Those string are in the files. I don't
know why.

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