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check: stamp a str for-range binding u8 in the wwstage

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cstage types the binding ty_u8; the wwstage single-binder arm peeled
the element only for slice/array iterables, so a str scrutinee fell to
the N_FORRANGE fallback decl and exprtype stamped the binding str.
The stamp-keyed call-arg marshal then pushed the 3-word str ABI for a
1-word scalar, and an uncast compare on the binding was falsely
rejected. Route str through the same synthetic-N_LET binder with a u8
element. Graduates r940_str_forrange_arg.
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Hojun-Cho
2026-08-07 23:52:08 +09:00
parent c717facf78
commit 06c20dbec4
2 changed files with 12 additions and 5 deletions
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Makefile
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@@ -584,8 +584,7 @@ DATABYTEID_EXPECTED_MIN = 911
# this list rather than silently widening coverage. Tracked with the #59
# divergence family.
DATABYTEID_DIVERGED = r76_typeeq_fn_diff_arity r76_typeeq_fn_diff_param_type \
r76_typeeq_fn_io_vtable_shape r76_typeeq_fn_variadic_vs_fixed \
r940_str_forrange_arg
r76_typeeq_fn_io_vtable_shape r76_typeeq_fn_variadic_vs_fixed
$(if $(DATABYTEID_FILES),,$(error test-byteid: empty data corpus))
test-data-byteid: $(BIN)/ww $(BIN)/w6c $(BIN)/w6c_ww
@work=$$(mktemp -d "$(CURDIR)/$(DATABYTEID_DIR).XXXXXX") || exit 1; \