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internal error when assigning a type to a constant of typedesc #9961

zevv opened this issue Dec 13, 2018 · 1 comment


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commented Dec 13, 2018

The following crashes the compiler:

import typetraits
import tables

proc test(v: typedesc) =

# This works:
test Table

# This also works:
const a = Table
test a

# But this crashes the compiler
const b: typedesc = Table
test b
internal error: (filename: "semmagic.nim", line: 162, column: 17)
Nim Compiler Version 0.19.0 [Linux: amd64]
Compiled at 2018-09-26
Copyright (c) 2006-2018 by Andreas Rumpf

git hash: f6c5c636bb1a1f4e1301ae0ba5a8afecef439132
active boot switches: -d:release

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commented Jan 7, 2019

Assigning a type to a constant constant of type typedesc. I never tried that. I guess Nim isn't strict enough here. I think neith const a = Table nor const b: typedesc = Table should be legal, since you can already create type aliases with the type declaration: type a = Table.

@krux02 krux02 changed the title internal error: (filename: "semmagic.nim", line: 162, column: 17) internal error when assigning a type to a constant of typedesc Jan 7, 2019

@narimiran narimiran added Crash and removed Crash internal error labels Feb 12, 2019

@narimiran narimiran closed this in 3b73da3 May 30, 2019

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