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chore: tweak error message about weak options #10844

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kim-em merged 1 commit into from
Oct 20, 2025
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chore: tweak error message about weak options #10844

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2 changes: 1 addition & 1 deletion src/Lean/Language/Lean.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -315,7 +315,7 @@ def reparseOptions (opts : Options) : IO Options := do
| unless weak do
throw <| .userError s!"invalid -D parameter, unknown configuration option '{name}'
If the option is defined in this library, use '-D{`weak ++ name}' to set it conditionally"
If the option is defined in a library, use '-D{`weak ++ name}' to set it conditionally"

let .ofString val := val
| opts' := opts'.insert name val -- Already parsed
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