Maintainer decision closing the last open RED from PR item 2.
`callback = handler` contains a genuine value occurrence of handler, and its
exact callable identity is proven -- the alias binding below could not be
created otherwise. The policy of this PR is proven exact value =>
CALL_REFERENCE, so that occurrence now emits a resolved reference row instead
of remaining an ordinary USAGE. Bare identifier RHS only, and the usage-carrier
rule in extract_usages.c is extended in lockstep, Python-gated -- a candidate
the LSP never matches would change nothing, but the asymmetry would be a trap.
The strategy distinction mirrors the argument path: a source name that is
itself a local alias claims lsp_callable_alias, so the local-shadow guard
admits exactly what it admits for arguments and refuses everything else.
In the graph the two occurrences inside `argument` -- the RHS and the alias
use in accept(callback) -- surface as ONE CALL_REFERENCE edge and zero USAGE
edges, because edge dedup is by (src, tgt, type) and collapsing multiple sites
between the same pair is its existing, intended behavior. That is precisely
what the fixture always asserted, so it needed no relaxation, only the comment
recording the decision.
Also: GCC rejects repro_call_argument_matrix_b's _Static_assert comparing
enumerators of two different anonymous enums (-Werror=enum-compare); clang
accepts it, so only the Linux leg saw it. Cast both sides to int.
repro_reference_precision + call_reference_contract: 100 passed, 0 failed.
This closes all five item-2 REDs.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Martin Vogel
c4c6005cde