Crystal compiler segfault

[xfbs]

When compiling this code, the compiler segfaults and I don't know why.

class Crash
  @num = 123
  @hash = Hash(String, Int32).new do
    Int32.new(@num)
  end
end

crash = Crash.new

Here's the compiler output (from crystal build cli.cr, where cli.cr is the above code):

Invalid memory access (signal 11) at address 0x0
[0x105719e0c] __crystal_sigfault_handler +76
[0x7fff88b1a52a] _sigtramp +26
[0x106f38346] _ZN4llvm11PointerType3getEPNS_4TypeEj +26
[0x106eb9903] _ZN4llvm12ConstantExpr16getGetElementPtrEPNS_4TypeEPNS_8ConstantENS_8ArrayRefIPNS_5ValueEEEbNS_8OptionalIjEES2_ +197
[0x1069be213] _ZN4llvm12ConstantExpr24getInBoundsGetElementPtrEPNS_4TypeEPNS_8ConstantENS_8ArrayRefIPNS_5ValueEEE +35
[0x1069be18b] _ZN4llvm9IRBuilderINS_14ConstantFolderENS_24IRBuilderDefaultInserterEE17CreateInBoundsGEPEPNS_4TypeEPNS_5ValueENS_8ArrayRefIS7_EERKNS_5TwineE +91
[0x106ec7b50] LLVMBuildInBoundsGEP +54
[0x105c7d2e0] *Crystal::CodeGenVisitor@Crystal::LLVMBuilderHelper#gep<LLVM::Value, Int32, Int32, String>:LLVM::Value +176
[0x105cc37e4] *Crystal::CodeGenVisitor#read_instance_var<Crystal::Type+, Crystal::Type+, String, LLVM::Value>:Bool +100
[0x105ca035c] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +19132
[0x105cbf2b4] *Crystal::CodeGenVisitor#prepare_call_args_non_external<Crystal::Call, Crystal::Def+, Crystal::Type+>:Tuple(Array(LLVM::Value), Bool) +1156
[0x105cb9b72] *Crystal::CodeGenVisitor#visit<Crystal::Call>:Bool +4434
[0x105c9feac] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +17932
[0x105cae251] *Crystal::CodeGenVisitor#codegen_fun<String, Crystal::Def+, Crystal::Type+, Bool, Crystal::CodeGenVisitor::ModuleInfo, Bool, Bool>:LLVM::Function +4321
[0x105c9cb53] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +4787
[0x105cb9be7] *Crystal::CodeGenVisitor#visit<Crystal::Call>:Bool +4551
[0x105c9feac] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +17932
[0x105cce164] *Crystal::CodeGenVisitor#run_instance_vars_initializers<Crystal::Type+, (Crystal::ClassType+ | Crystal::GenericClassType+), LLVM::Value>:Nil +1012
[0x105ccd506] *Crystal::CodeGenVisitor#allocate_aggregate<Crystal::Type+>:LLVM::Value +3750
[0x105cc4117] *Crystal::CodeGenVisitor#codegen_primitive<Crystal::Call, Crystal::Primitive+, Crystal::Def+, Array(LLVM::Value)>:LLVM::Value +1703
[0x105cb9d07] *Crystal::CodeGenVisitor#visit<Crystal::Call>:Bool +4839
[0x105c9feac] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +17932
[0x105cb363d] *Crystal::CodeGenVisitor#visit<Crystal::Assign>:(Bool | Nil) +317
[0x105c9c86f] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +4047
[0x105c9c6a9] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +3593
[0x105cae251] *Crystal::CodeGenVisitor#codegen_fun<String, Crystal::Def+, Crystal::Type+, Bool, Crystal::CodeGenVisitor::ModuleInfo, Bool, Bool>:LLVM::Function +4321
[0x105cb18b3] *Crystal::CodeGenVisitor#target_def_fun<Crystal::Def+, Crystal::Type+>:LLVM::Function +2611
[0x105cb9d26] *Crystal::CodeGenVisitor#visit<Crystal::Call>:Bool +4870
[0x105c9feac] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +17932
[0x105cb363d] *Crystal::CodeGenVisitor#visit<Crystal::Assign>:(Bool | Nil) +317
[0x105c9c86f] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +4047
[0x105c9c6a9] *Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::CodeGenVisitor>:Nil +3593
[0x105c57afb] *Crystal::Compiler#codegen<Crystal::Program, Crystal::ASTNode+, Array(Crystal::Compiler::Source), String>:(Tuple(Array(Crystal::Compiler::CompilationUnit), Array(String)) | Nil) +539
[0x106006164] *Crystal::Compiler#compile<Array(Crystal::Compiler::Source), String>:Crystal::Compiler::Result +116
[0x10572d3b7] *Crystal::Command#run:(Bool | Crystal::Compiler::Result | IO::FileDescriptor | Nil) +327
[0x1056f3e0b] main +12427

Information about my system:

$ uname -a
Darwin xfbs-air 15.6.0 Darwin Kernel Version 15.6.0: Tue Jan  9 20:12:05 PST 2018; root:xnu-3248.73.5~1/RELEASE_X86_64 x86_64

$ brew info crystal-lang
crystal-lang: stable 0.24.1 (bottled), HEAD
Fast and statically typed, compiled language with Ruby-like syntax
https://crystal-lang.org/
/usr/local/Cellar/crystal-lang/0.24.1_1 (827 files, 47.6MB)
  Poured from bottle on 2018-01-24 at 12:15:56
/usr/local/Cellar/crystal-lang/0.24.1_2 (827 files, 47.6MB) *
  Poured from bottle on 2018-01-29 at 15:45:04
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/crystal-lang.rb
==> Dependencies
Build: pkg-config, libatomic_ops
Required: libevent, bdw-gc, llvm, pcre, gmp, libyaml
==> Options
--without-release
	Do not build the compiler in release mode
--without-shards
	Do not include `shards` dependency manager
--HEAD
	Install HEAD version
==> Caveats
Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completions have been installed to:
  /usr/local/share/zsh/site-functions

$ crystal -v
Crystal 0.24.1 (2018-01-27)

LLVM: 5.0.1
Default target: x86_64-apple-macosx

[straight-shoota]

Reduced example:

class Foo
  @foo = "foo"
  @bar : String = -> { @foo }.call
end

Foo.new

carc.in

[Groogy]

It looks like I am getting the same crash but from a little bit different cause. From my code reduced to as minimal as I can

alias Type = Nil | Bool | Int64 | Float64 | String | Time | Bytes | Array(Type) | Hash(Type, Type) | Set(Type)

abstract class BaseNode
  @value : Type
end

class Node(AttachedData) < BaseNode
  def initialize(@data : AttachedData, @value : Type, @key : String | Int32 | Nil)
  end
end

node = Node.new nil, nil, nil

If I take away so the class isn't a generic anymore then it stops failing to compile.

[asterite]

Duplicate of #2865