sqlite3: allow Row construction with cursor having no description - #8364

#!/bin/bash
set -euo pipefail

echo "== file outline =="
ast-grep outline crates/stdlib/src/_sqlite3.rs --match sqlite3 --view expanded || true

echo "== relevant sqlite3 lines =="
sed -n '2220,2290p' crates/stdlib/src/_sqlite3.rs | cat -n

echo "== PyStr expect_str usages and to_str definitions =="
rg -n "expect_str|fn to_str|struct PyStr" crates/vm/src/builtins crates/vm/src crates/stdlib/src -S

echo "== str implementation slice =="
sed -n '1,220p' crates/vm/src/builtins/str.rs | cat -n

#!/bin/bash
set -euo pipefail

echo "== PyStr to_str / expect_str implementations =="
sed -n '500,560p' crates/vm/src/builtins/str.rs | cat -n

echo "== Cursor Inner description initialization/usages around expected area =="
sed -n '1800,2220p' crates/stdlib/src/_sqlite3.rs | cat -n

echo "== Rust code static check for Row::subscript error path panic possibility =="
python3 - <<'PY'
from pathlib import Path
p = Path("crates/stdlib/src/_sqlite3.rs")
text = p.read_text()
start = text.index("impl Row {")
end = text.index("impl Constructor for Row", start)
body = text[start:end]
print("subscript contains two name.expect_str() in comparison:", "name.expect_str().chars().flat_map" in body)
print("subscript contains name.expect_str() in error message:", "No item with key" in body and "name.expect_str()" in body)
# Extract matching closure/error text as data only without executing repository code.
lines = body.splitlines()
for i, line in enumerate(lines, 1):
    if "subscript" in line or "No item with key" in line:
        print(f"{i}: {line}")
PY

#!/bin/bash
set -euo pipefail

echo "== Row subscript exact implementation for context =="
python3 - <<'PY'
from pathlib import Path
import re, itertools
text = Path("crates/stdlib/src/_sqlite3.rs").read_text()
start = text.index("impl Row {", text.index("struct CursorInner"))
end = text.index("impl Constructor for Row", start)
body = text[start:end].splitlines()
for i, line in enumerate(body, 1):
    if line.strip().startswith("fn subscript") or line.strip().startswith("Ok(Self::new_uninitialized"):
        for j in range(i-1 if i>1 else 0, min(i+65, len(body))):
            print(f"{j+1}: {body[j]}")
        print("---")
PY

echo "== describe row_factory construction behavior for Row subscript reachability =="
rg -n "row_factory|new_row|Row::|fetchone|fetchmany|fetchall" crates/stdlib/src/_sqlite3.rs -C 4