Compliation error when formatting a complex number

[lscrd]

Description

The following code doesn’t compile:

import std/[complex, strformat]

let z = complex64(1, 2)
echo fmt"{z}"

The error occurs in procedure "formatValueAsComplexNumber". The procedure "contains" with expected signature is not available.

Nim Version

Nim Compiler Version 2.2.0 [Linux: amd64]
Compiled at 2024-10-02
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 78983f1
active boot switches: -d:release

Also encountered with development version.

Current Output

Compilation error:

/tmp/x.nim(4, 9) template/generic instantiation of `fmt` from here
/home/xxx/.choosenim/toolchains/nim-2.2.0/lib/pure/complex.nim(469, 31) template/generic instantiation of `formatValueAsComplexNumber` from here
/home/xxx/.choosenim/toolchains/nim-2.2.0/lib/pure/complex.nim(449, 31) Error: type mismatch
Expression: contains(specifier, {'e', 'E', 'f', 'F', 'g', 'G'})
  [1] specifier: string
  [2] {'e', 'E', 'f', 'F', 'g', 'G'}: set[char]

Expected one of (first mismatch at [position]):
[1] func contains[T](x: set[T]; y: T): bool
[1] proc contains[U, V, W](s: HSlice[U, V]; value: W): bool
[2] proc contains[T](a: openArray[T]; item: T): bool

Expected Output

No compilation error.

Known Workarounds

A workaround consists to add "strutils" to the list of imported modules.

This compiles without error:

import std/[complex, strformat, strutils]

let z = complex64(1, 2)
echo fmt"{z}"

Additional Information

In module "complex.nim" of the standard library, the procedure "contains" with the expected signature is not available. It can be found in "std/strutils". Importing "strutils" (or at least the procedure "contains") in "complex.nim" would solve the problem but would create a dependency.

[metagn]

!nim c

import std/[complex, strformat]

let z = complex64(1, 2)
discard fmt"{z}"

[github-actions]

🐧 Linux bisect by @metagn (collaborator)

devel 👎 FAIL

Output

Filesize 0 (0 bytes)
Duration

stable 👎 FAIL

Output

Filesize 0 (0 bytes)
Duration

2.0.10 👍 OK

Output

Filesize 108.70 Kb (111,304 bytes)
Duration

2.0.0 👍 OK

Output

Filesize 118.96 Kb (121,816 bytes)
Duration

1.6.20 👍 OK

Output

Filesize 122.80 Kb (125,752 bytes)
Duration

1.4.8 👍 OK

Output

Filesize 119.48 Kb (122,352 bytes)
Duration

1.2.18 👍 OK

Output

Filesize 119.53 Kb (122,400 bytes)
Duration

1.0.10 👍 OK

Output

Filesize 114.60 Kb (117,352 bytes)
Duration

#52784f32b ➡️ 🐛

Diagnostics

angel ezquerra introduced a bug at 2023-11-10 05:29:55 +0100 on commit #52784f32b with message:

The bug is in the files:

The bug can be in the commits:

• #fbfd4decc
• #80ffbd457
• #cd84cd45e
• #3680200df
• #d0cc02dfc
• #57ffeafda
• #0dc351361
• #52784f32b
• #60597adb1

(Diagnostics sometimes off-by-one).

Stats

• GCC 13.3.0
• Clang 18.1.3
• NodeJS 18.2
• Created 2025-02-05T00:35:16Z
• Comments 1
• Commands nim c --run -d:nimDebug -d:nimDebugDlOpen -d:ssl -d:nimDisableCertificateValidation --forceBuild:on --colors:off --verbosity:0 --hints:off --lineTrace:off --nimcache:/home/runner/work/Nim/Nim --out:/home/runner/work/Nim/Nim/temp /home/runner/work/Nim/Nim/temp.nim

🤖 Bug found in 38 mins bisecting 1166 commits at 30 commits per second