agra 097d23d909 fix: presence-preserving optional->optional coercion (issue 0180) ...

The generic-?? wrong-fallback was not in lowerNullCoalesce: coercing
?A -> ?B (differing payload, e.g. the ?i32->?i64 call-arg coercion when
instantiating unwrap_or(99, ?i32)) routed through .optional_wrap, which
unconditionally unwrapped the source and re-wrapped as ALWAYS-PRESENT, so
a null became present-zero everywhere (args, returns, field init,
var-decl, ??). Add a CoercionPlan.optional_to_optional (conversions.zig)
+ a presence-preserving arm in coerceMode (coerce.zig): has_value ->
present: unwrap+coerce-child+wrap-present; absent: constNull(dst); merge
via a dst_ty block param. lowerVarDecl gains a !src_is_optional guard so
an annotated x : ?B = <?A> routes through the same arm (also makes
aggregate-payload var-decl ?[3]i64->?[]i64 / ?Concrete->?Protocol work).

Alias-optional struct-literal default already works (grouping + 0166);
a 1-tuple default ?(i32,) ?? 5 now emits a clean diagnostic instead of an
LLVM PHI abort (no implicit scalar->1-tuple coercion per spec).

Regressions: optionals/0916 (generic ??), 0917 (alias struct default),
0918 (var-decl optional->optional), diagnostics/1202 (1-tuple default) +
a conversions.test.zig unit test. Verified by 3 adversarial reviews,
suite 798/0.

2026-06-23 16:16:47 +03:00

..

1100-diagnostics-err-field-not-found.exit

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1101-diagnostics-err-tuple-oob.exit

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fix: diagnose ?(?T) tuple-payload mismatch instead of malformed IR (issue 0165)

2026-06-22 21:54:12 +03:00

1101-diagnostics-err-tuple-oob.stdout

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1102-diagnostics-err-dot-shorthand.exit

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1103-diagnostics-err-bad-variant.exit

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1104-diagnostics-callconv-mismatch-diagnostic.exit

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1105-diagnostics-compile-error.exit

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1106-diagnostics-binop-operand-type-check.exit

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1107-diagnostics-ref-capture-value-arg-diagnostic.exit

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1108-diagnostics-pointer-param-value-arg-diagnostic.exit

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1111-diagnostics-nondollar-type-param-rejected.exit

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1112-diagnostics-unknown-type-name-rejected.exit

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1116-diagnostics-tuple-type-nontype-element-rejected.exit

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1117-diagnostics-value-const-as-type-rejected.exit

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1118-diagnostics-global-non-const-initializer-rejected.exit

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1119-diagnostics-reserved-type-name-as-identifier.exit

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1125-diagnostics-reserved-name-method-param.exit

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1128-diagnostics-comptime-global-funcref-rejected.exit

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1130-diagnostics-array-dim-oversized-u32.exit

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1130-diagnostics-atomic-nonscalar.exit

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1133-diagnostics-array-dim-negative-float.exit

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1136-diagnostics-array-dim-nonconst-direct-no-crash.exit

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1137-diagnostics-value-param-type-fn-no-cascade.exit

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1138-diagnostics-inline-for-non-integral-bound.exit

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1143-diagnostics-typed-module-const-mismatch.exit

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1154-diagnostics-for-call-needs-capture.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1155-diagnostics-for-not-iterable.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1155-diagnostics-for-not-iterable.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1155-diagnostics-for-not-iterable.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1156-diagnostics-int-literal-out-of-range.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1156-diagnostics-int-literal-out-of-range.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1156-diagnostics-int-literal-out-of-range.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1157-diagnostics-catch-binding-needs-parens.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1157-diagnostics-catch-binding-needs-parens.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1157-diagnostics-catch-binding-needs-parens.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1158-diagnostics-import-dir-file-ambiguous.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1158-diagnostics-import-dir-file-ambiguous.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1158-diagnostics-import-dir-file-ambiguous.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1159-diagnostics-array-const-mixed-elements.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1159-diagnostics-array-const-mixed-elements.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1159-diagnostics-array-const-mixed-elements.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1160-diagnostics-array-const-runtime-element.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1160-diagnostics-array-const-runtime-element.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1160-diagnostics-array-const-runtime-element.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1161-diagnostics-array-const-dim-mismatch.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1161-diagnostics-array-const-dim-mismatch.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1161-diagnostics-array-const-dim-mismatch.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1162-diagnostics-const-write-rejected.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1162-diagnostics-const-write-rejected.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1162-diagnostics-const-write-rejected.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1163-diagnostics-array-const-index-oob.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1163-diagnostics-array-const-index-oob.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1163-diagnostics-array-const-index-oob.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1164-diagnostics-inline-for-pack-rejections.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1164-diagnostics-inline-for-pack-rejections.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1164-diagnostics-inline-for-pack-rejections.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1165-diagnostics-generic-return-unbound.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1165-diagnostics-generic-return-unbound.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1165-diagnostics-generic-return-unbound.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1166-diagnostics-ufcs-not-opted-in.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1166-diagnostics-ufcs-not-opted-in.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1166-diagnostics-ufcs-not-opted-in.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1167-diagnostics-call-arity-mismatch.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1167-diagnostics-call-arity-mismatch.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1167-diagnostics-call-arity-mismatch.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1168-diagnostics-generic-param-uninferrable.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1168-diagnostics-generic-param-uninferrable.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1168-diagnostics-generic-param-uninferrable.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1169-diagnostics-enum-literal-bad-target.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1169-diagnostics-enum-literal-bad-target.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1169-diagnostics-enum-literal-bad-target.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1170-diagnostics-enum-literal-no-target.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1170-diagnostics-enum-literal-no-target.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1170-diagnostics-enum-literal-no-target.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1171-diagnostics-logical-not-bad-operand.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1171-diagnostics-logical-not-bad-operand.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1171-diagnostics-logical-not-bad-operand.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1172-diagnostics-extern-symbol-conflict.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1172-diagnostics-extern-symbol-conflict.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1172-diagnostics-extern-symbol-conflict.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1173-diagnostics-cstring-coercions.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1173-diagnostics-cstring-coercions.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1173-diagnostics-cstring-coercions.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1175-diagnostics-extern-export-conflict.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1175-diagnostics-extern-export-conflict.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1175-diagnostics-extern-export-conflict.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1176-diagnostics-import-parse-error-location.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1176-diagnostics-import-parse-error-location.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1176-diagnostics-import-parse-error-location.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1177-diagnostics-addr-of-const-rejected.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1177-diagnostics-addr-of-const-rejected.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1177-diagnostics-addr-of-const-rejected.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1178-diagnostics-infinite-size-self-reference.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1178-diagnostics-infinite-size-self-reference.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1178-diagnostics-infinite-size-self-reference.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1179-diagnostics-comptime-type-construction-bail.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1179-diagnostics-comptime-type-construction-bail.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1179-diagnostics-comptime-type-construction-bail.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1180-diagnostics-metatype-duplicate-variant.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1180-diagnostics-metatype-duplicate-variant.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1180-diagnostics-metatype-duplicate-variant.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1181-diagnostics-metatype-declare-never-defined.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1181-diagnostics-metatype-declare-never-defined.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1181-diagnostics-metatype-declare-never-defined.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1182-diagnostics-metatype-infinite-size-constructed.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1182-diagnostics-metatype-infinite-size-constructed.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1182-diagnostics-metatype-infinite-size-constructed.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1183-diagnostics-many-pointer-to-slice-rejected.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1183-diagnostics-many-pointer-to-slice-rejected.stderr

refactor: List is slice-backed { items: []T; cap } — directly iterable

2026-06-22 11:55:19 +03:00

1183-diagnostics-many-pointer-to-slice-rejected.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1184-diagnostics-weld-fn-unexported.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1184-diagnostics-weld-fn-unexported.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1184-diagnostics-weld-fn-unexported.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1185-diagnostics-weld-fn-runtime-call.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1185-diagnostics-weld-fn-runtime-call.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1185-diagnostics-weld-fn-runtime-call.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1186-diagnostics-atomic-cas-ordering.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1186-diagnostics-atomic-cas-ordering.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1186-diagnostics-atomic-cas-ordering.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1187-diagnostics-atomic-fence-relaxed.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1187-diagnostics-atomic-fence-relaxed.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1187-diagnostics-atomic-fence-relaxed.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1188-diagnostics-run-no-main.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1188-diagnostics-run-no-main.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1188-diagnostics-run-no-main.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1189-diagnostics-unknown-builtin.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1189-diagnostics-unknown-builtin.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1189-diagnostics-unknown-builtin.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1190-diagnostics-protocol-missing-receiver.exit

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1190-diagnostics-protocol-missing-receiver.stderr

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1190-diagnostics-protocol-missing-receiver.stdout

test: group examples into per-category folders

2026-06-21 14:41:34 +03:00

1191-diagnostics-union-literal-overlap.exit

fix: union struct-literal init (issue 0158)

2026-06-22 09:45:17 +03:00

1191-diagnostics-union-literal-overlap.stderr

fix: union struct-literal init (issue 0158)

2026-06-22 09:45:17 +03:00

1191-diagnostics-union-literal-overlap.stdout

fix: union struct-literal init (issue 0158)

2026-06-22 09:45:17 +03:00

1192-diagnostics-many-pointer-open-slice.exit

fix: slicing a many-pointer yields a correct slice (issue 0159)

2026-06-22 10:15:18 +03:00

1192-diagnostics-many-pointer-open-slice.stderr

fix: slicing a many-pointer yields a correct slice (issue 0159)

2026-06-22 10:15:18 +03:00

1192-diagnostics-many-pointer-open-slice.stdout

fix: slicing a many-pointer yields a correct slice (issue 0159)

2026-06-22 10:15:18 +03:00

1193-diagnostics-readonly-property-write.exit

feat: #set property accessors (write counterpart of #get)

2026-06-22 17:55:18 +03:00

1193-diagnostics-readonly-property-write.stderr

feat: #set property accessors (write counterpart of #get)

2026-06-22 17:55:18 +03:00

1193-diagnostics-readonly-property-write.stdout

feat: #set property accessors (write counterpart of #get)

2026-06-22 17:55:18 +03:00

1194-diagnostics-condition-non-bool-type.exit

fix: bindingless if/while/and/or over optional reads has_value (issue 0164)

2026-06-22 21:04:05 +03:00

1194-diagnostics-condition-non-bool-type.stderr

fix: bindingless if/while/and/or over optional reads has_value (issue 0164)

2026-06-22 21:04:05 +03:00

1194-diagnostics-condition-non-bool-type.stdout

fix: bindingless if/while/and/or over optional reads has_value (issue 0164)

2026-06-22 21:04:05 +03:00

1196-diagnostics-array-literal-head-unknown-type.exit

fix: literal element typing — typed-array null element, tuple coercion, positional var element (0173-0175)

2026-06-23 00:25:28 +03:00

1196-diagnostics-array-literal-head-unknown-type.stderr

fix: literal element typing — typed-array null element, tuple coercion, positional var element (0173-0175)

2026-06-23 00:25:28 +03:00

1196-diagnostics-array-literal-head-unknown-type.stdout

fix: literal element typing — typed-array null element, tuple coercion, positional var element (0173-0175)

2026-06-23 00:25:28 +03:00

1197-diagnostics-protocol-erasure-no-impl.exit

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1197-diagnostics-protocol-erasure-no-impl.stderr

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1197-diagnostics-protocol-erasure-no-impl.stdout

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1198-diagnostics-protocol-erasure-generic-method.exit

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1198-diagnostics-protocol-erasure-generic-method.stderr

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1198-diagnostics-protocol-erasure-generic-method.stdout

fix: diagnose non-conforming protocol erasure instead of unreachable-thunk SIGABRT (issue 0176)

2026-06-23 02:13:30 +03:00

1199-diagnostics-optional-to-bool.exit

fix: reject implicit ?T -> bool coercion instead of silent false (issue 0169)

2026-06-23 02:47:51 +03:00

1199-diagnostics-optional-to-bool.stderr

fix: reject implicit ?T -> bool coercion instead of silent false (issue 0169)

2026-06-23 02:47:51 +03:00

1199-diagnostics-optional-to-bool.stdout

fix: reject implicit ?T -> bool coercion instead of silent false (issue 0169)

2026-06-23 02:47:51 +03:00

1200-diagnostics-null-coalesce-non-optional.exit

fix: diagnose ?? with a non-optional lhs instead of codegen panic (issue 0172)

2026-06-23 03:31:58 +03:00

1200-diagnostics-null-coalesce-non-optional.stderr

fix: diagnose ?? with a non-optional lhs instead of codegen panic (issue 0172)

2026-06-23 03:31:58 +03:00

1200-diagnostics-null-coalesce-non-optional.stdout

fix: diagnose ?? with a non-optional lhs instead of codegen panic (issue 0172)

2026-06-23 03:31:58 +03:00

1201-diagnostics-protocol-impl-signature-mismatch.exit

fix: validate protocol impl method signatures vs the protocol declaration (issue 0178)

2026-06-23 08:48:31 +03:00

1201-diagnostics-protocol-impl-signature-mismatch.stderr

fix: validate protocol impl method signatures vs the protocol declaration (issue 0178)

2026-06-23 08:48:31 +03:00

1201-diagnostics-protocol-impl-signature-mismatch.stdout

fix: validate protocol impl method signatures vs the protocol declaration (issue 0178)

2026-06-23 08:48:31 +03:00

1202-diagnostics-null-coalesce-tuple-default.exit

fix: presence-preserving optional->optional coercion (issue 0180)

2026-06-23 16:16:47 +03:00

1202-diagnostics-null-coalesce-tuple-default.stderr

fix: presence-preserving optional->optional coercion (issue 0180)

2026-06-23 16:16:47 +03:00

1202-diagnostics-null-coalesce-tuple-default.stdout

fix: presence-preserving optional->optional coercion (issue 0180)

2026-06-23 16:16:47 +03:00