Using this mod and Angel's Smelting leads to a crash.

Angel's Smelting introduces a dependency from 'modules' to the disabled 'angels-silver-smelting-1' tech. More Infinite Research detects that dependency and rejects the downstream science progression, making everything explode.

I worked out an ugly fix fueled by too much coffee - in 'data-final-fixes.lua' I just dropped this to surgically ignore this one point of failure. It's a kitchen-sink fix but it seems to work without breaking anything:

local tech = data.raw.technology["modules"]

if tech and tech.prerequisites then
for i = #tech.prerequisites, 1, -1 do
if tech.prerequisites[i] == "angels-silver-smelting-1" then
table.remove(tech.prerequisites, i)
log("[Test Fix] Removed disabled Angel's Silver Smelting 1 prerequisite from modules")
end
end
end

Cheers, your diagnosis was right. v4.5.2 includes a guarded version of that repair: it removes that one prerequisite only when Angel’s Smelting is installed and the silver technology actually exists and is disabled, thanks again for the help

Glad to help. I did say my fix was very kitchen-sink, I just wanted to make my game stop crashing - Happy you could work it into something actually useful :)