Perry E. Metzger 25fa20b92f SCP: Fix sim_exp_check() stale capture-group cleanup bug ...

Symptom
After one regex match with more capture groups, a later regex match with
fewer groups could leave stale _EXPECT_MATCH_GROUP_n values behind from
the earlier match.

Example:

      1) A first match exports:
            - _EXPECT_MATCH_GROUP_0=ab42
            - _EXPECT_MATCH_GROUP_1=4
            - _EXPECT_MATCH_GROUP_2=2
      2) A later match with only one subgroup exports:
            - _EXPECT_MATCH_GROUP_0=cd7
            - _EXPECT_MATCH_GROUP_1=7
      3) _EXPECT_MATCH_GROUP_2 incorrectly remained "2" instead of
          being cleared or blanked.

Cause
sim_exp_check() tracked the prior regex state in a static
sim_exp_match_sub_count, but it updated that count incorrectly after a
successful match.

It stored the wrong bound for later cleanup, so the loop that blanked
stale _EXPECT_MATCH_GROUP_n entries did not run far enough.

2026-04-20 11:43:24 -10:00

718 KiB

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