Opaque `such-that` error when using `##NaN` as bound

Description

(mg/generate [:>= ##NaN])
;Couldn't satisfy such-that predicate after 10 tries.
(mg/generate [:> ##NaN])
;Couldn't satisfy such-that predicate after 10 tries.
(mg/generate [:< ##NaN])
;Couldn't satisfy such-that predicate after 10 tries.
(mg/generate [:<= ##NaN])
;Couldn't satisfy such-that predicate after 10 tries.
(mg/generate [:double {:max ##NaN}])
;Couldn't satisfy such-that predicate after 10 tries.

Contributor guide

Tech stack

None

Domain

data

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

under 1 hour

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

blocked

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Clojure basicsNaN handling

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

20

Research direction

Investigate the such that predicate generation in the generator implementation for double. Look at how bounds are validated in the generator code (likely in src/malli/generator.cljc or similar). The issue arises when using ##NaN as a bound; the generator fails after 10 tries. Consider adding a specific check for NaN bounds to skip or handle appropriately.