Harrison BoothandClaude Opus 5.5 2aeb21d4d3 Formulas: flat operator chains as long as Excel allows (#916) ...

along: =1+1+... with 4,096 operands (8,192 characters, exactly Excel's
limit, which Excel accepts and calculates) overflowed the stack when
entered, because the derived Clone of Expr recursed once per operand
down the chain's left spine. Saving hit the same in the XLSX writer.

- Expr: Clone, PartialEq, walk and map follow the left spine in a loop
  and recurse only into right operands and real nesting.
- XLSX: _xlpm. prefixing and the implicit-intersection scan follow the
  spine too. The scan's depth limit of 64 wrote any chain of more than
  about 64 operands as a dynamic-array formula; such sums are plain
  formulas again (ranges in the chain still get array evaluation).
- Evaluate Formula borrows sub-expressions instead of cloning each
  operator's subtree (quadratic memory on a long chain).
- Spanish formula entry and display no longer refuse chains of more
  than 256 operands; the left spine does not count as nesting.

Tests run on a 1 MiB stack (the Windows main thread) with Excel's
observed results: formula (clone/eq/walk/map/adjust at 4,096), calc
(401 and 4,096 operands, -, *, /, ^, &, %, comparisons, 1,500 refs),
xlsx (long chains written as scalar formulas), engine (cell.set, fill,
copy/paste, insert rows/columns, undo/redo, Evaluate Formula, XLSX save
and reopen), Spanish entry. Each fails without the fix.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-19 18:54:30 -05:00

..

autofit_filter_buttons.rs

home.autofitColumnWidth: reserve filter dropdown space

2026-10-11 22:09:51 +01:00

command_sequence_fuzz.rs

Engine: command-sequence fuzz harness (undo/redo, XLSX round-trip, full-recalc invariants) and the bugs it found

2026-10-11 16:39:31 -04:00

cross_sheet_cut.rs

Fix #128: preserve references when cutting cells across sheets

2026-10-10 06:11:29 -04:00

csv_export_budget.rs

CSV export: refuse a file over 512 MiB instead of expanding the whole used range (#528)

2026-10-13 01:16:05 +02:00

custom_filter_blanks.rs

Hide blank and text rows for numeric ordering custom filters

2026-10-18 20:25:07 +02:00

custom_view_freeze.rs

Restore frozen panes when showing a custom view (#577)

2026-10-12 08:33:43 +02:00

extreme_selection_moves.rs

selection.move: clamp extreme dr/dc to the sheet edge instead of overflowing

2026-10-10 21:05:58 -05:00

ink_roundtrip.rs

#551: preserve editable ink through XLSX round trips

2026-10-12 23:54:44 +08:00

line_count_overflow.rs

Test: the helper is new_session so a rebound session variable does not shadow it

2026-10-12 23:23:33 -04:00

long-operator-chains.rs

Formulas: flat operator chains as long as Excel allows (#916)

2026-10-19 18:54:30 -05:00

offset_overflow.rs

OFFSET: huge offsets and sizes give #REF! instead of overflowing

2026-10-11 20:50:23 -05:00

pivot_unknown_func.rs

Reject unknown value-field func in insert.pivotTable (#1757)

2026-10-17 18:34:28 -06:00

range_fill_formats.rs

fix(edit): Ctrl+Enter gives each cell the number format typing gives it

2026-10-19 12:18:34 +02:00

row_autofit.rs

#833: pin hidden-row formatting, grow-only restore branch, tighten tests

2026-10-12 20:48:43 -03:00

sparse_clear_invalidation.rs

fix(edit): recalculate every cell changed by large clears (#1032) (#1128)

2026-10-15 13:38:13 -06:00

stored_list_shape.rs

Fix saving a custom view or script when the stored list is not a JSON object (#517)

2026-10-12 08:37:04 +02:00

table_resize_overlap.rs

Reject table.resize to a range that does not overlap the table (#575)

2026-10-12 08:27:34 +02:00

table_total_row_last_row.rs

Refuse Total Row on a table that ends on the last worksheet row (#533)

2026-10-12 08:37:37 +02:00