bolt/rules/suspicious/index.bend fails

raw source on the hub · import 0x729eecea86ea5a2cdba3a2856a313bca/bolt/rules/suspicious/index.bend as Index

rule index: a def that calls itself also calls List.get(..) or String.get(..). Both walk the cons list from the head to the index, so a per-index loop is quadratic (AppSprout's sort went from 39 s to 0.9 s walking the list itself). Walk the list in the recursion, or materialize what the loop needs in one pass. A literal index (List.get(.., xs, 0n)) is a head access and exempt, as are laws and proofs.

7 imports

import Base
import ../../src.bend as Src
import ../../finding.bend as F
import ../../../syntax/lex.bend as Lex
import ../../../syntax/tree.bend as Tree
import ../calls.bend as Calls
import ../../../lazy/lazy.bend as Lazy

The reader could not load this file (at 0x729eecea86ea5a2cdba3a2856a313bca/bolt/config.bend:31). What bend.ts says:

Error:
- expected : a fresh name (duplicate declaration: Set)
- observed : 'Set'
Location:
30 | # a name (a group's or a rule's) at a level
31>| type Set is Data:
   |      ^^^
32 |   Set{name: String, level: Level}