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Crystal's standard library has some dependencies on C libraries, and so do programs which use the standard library. Some dependencies apply to all programs (used by core lib from the prelude), some on…
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This code
```crystal
def foo : Void
end
p = ->() do foo.as(Void) end
```
Causes this compiler bug message:
```
BUG: trying to upcast Void
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Hi!
Thank you for creating very useful library.
### Motivation
I am building a [tool](https://github.com/kojix2/cry-wasm) as a hobby to call WebAssembly functions generated by Crystal language…
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This may be related to #12472 but I wasn't positive, so I'm creating a new bug report just in case.
Below causes a compiler bug error:
```
def call_proc(pr : Proc(String, Nil) | Proc(String, Stri…
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https://play.crystal-lang.org/#/r/7858
```crystal
module Assertion
abstract def valid? : Bool
end
class Validator
def initialize : Nil
([] of Assertion).reject(&.valid?)
end
en…
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Meanwhile `GLib::String` must be transparent for Crystal users, i.e. translated to Crystal strings.
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I spent some time yesterday trying to improve the memory usage of https://github.com/Blacksmoke16/oq when parsing large XML documents into JSON. However as I learned more about `libXML` I realized wh…
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**Is your enhancement request related to a problem? Please describe.**
Yes, lsquic causes a lot of signal 11 killed errors, so I thought this would be worth a shot to fix the issue
**D…