Nim Version

Nim Compiler Version 2.3.1 [Linux: amd64]
Compiled at 2026-03-25
Copyright (c) 2006-2026 by Andreas Rumpf

git hash: 158d59c
active boot switches: -d:release

Description

The compiler crashes with IndexDefect: index 1 not in 0 .. 0 when using >= or > on a dereferenced withValue pointer, if a separate module defines func >= overloads.

# dep.nim

type Foo* = distinct int

func `>=`*(a, b: Foo): bool {.inline.} = int(a) >= int(b)

# main.nim

import std/tables

import dep

proc f() =
  var t = initTable[string, int]()
  t.withValue("k", v):
    if v[] >= 0:  # CRASH: >= with v[] dereference + imported >= overloads
      discard

Notes

• <, <=, ==, != do not crash
• let x = v[]; if x >= 0: does not crash
• Defining func >= in the same file does not crash — must be imported

Current Output

Hint: used config file '/home/user/.local/share/grabnim/nim-devel/config/nim.cfg' [Conf]
Hint: used config file '/home/user/.local/share/grabnim/nim-devel/config/config.nims' [Conf]
Hint: used config file '/home/user/Nim/async-kafka/tests/config.nims' [Conf]
....................................................................................fatal.nim(62)            sysFatal
Error: unhandled exception: index 1 not in 0 .. 0 [IndexDefect]

Expected Output

Known Workarounds

No response

Additional Information

No response