[m-rev.] for post-commit review and request for tryout: simplify a test

[Zoltan Somogyi]

On Mon, 16 Feb 2026 12:34:01 +1100, Julien Fischer <jfischer at opturion.com> wrote:
> Using the latest commit for mercury-json
> (<https://github.com/juliensf/mercury-json>)
> and adding to --warn-unused-args  to MCFLAGS in src/Mercury.options and then
> running 'make' in the src directory gives me one of the new exceptions.:
> 
> Making Mercury/asm_fast.gc/x86_64-pc-linux-gnu/Mercury/opts/json.opt
> Making Mercury/asm_fast.gc/x86_64-pc-linux-gnu/Mercury/cs/json.c
> Uncaught Mercury exception:
> Software Error: predicate
> `transform_hlds.unused_args.may_gather_warning_pragma_for_pred'/3:
> Unexpected: old succeeds, new fails
> Stack dump not available in this grade.
> ** Error making `Mercury/asm_fast.gc/x86_64-pc-linux-gnu/Mercury/cs/json.c'.
> make: *** [Makefile:5: default] Error 1

The attached committed diff fixes this problem. Please try out the
fixed version.

Zoltan.



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