crystal 0.20.0 Module validation failed

[faustinoaq]

Hi 👋

I'm trying to compile the following code:

# test.cr
a = 0
spawn do
  a = 1
end
sleep 1
puts a

And crystal 0.20.0 show me a bug:

$/opt/crystal/bin/crystal build -s -d test.cr
Using compiled compiler at .build/crystal
Parse:                             00:00:00.0002099 (   0.19MB)
Semantic (top level):              00:00:00.1612676 (  27.28MB)
Semantic (new):                    00:00:00.0015706 (  27.28MB)
Semantic (type declarations):      00:00:00.0333564 (  27.28MB)
Semantic (abstract def check):     00:00:00.0013453 (  27.28MB)
Semantic (cvars initializers):     00:00:00.0111769 (  27.28MB)
Semantic (ivars initializers):     00:00:00.0007451 (  27.28MB)
Semantic (main):                   00:00:00.1305432 (  43.34MB)
Semantic (cleanup):                00:00:00.0009511 (  43.34MB)
Semantic (recursive struct check): 00:00:00.0007060 (  43.34MB)
Codegen (crystal):                Module validation failed: inlinable function call in a function with debug info must have a !dbg location
  %10 = call i8* @__crystal_malloc(i32 ptrtoint (i32* getelementptr (i32, i32* null, i32 1) to i32))

0x70feee: *raise<Exception>:NoReturn at ??
0x70fe27: ??? at ??
0x104f561: *LLVM::Module#verify:Nil at ??
0x104e1d7: *Crystal::CodeGenVisitor#finish:Hash(String, LLVM::Module) at ??
0xf896c1: *Crystal::Compiler#codegen<Crystal::Program, Crystal::ASTNode+, Array(Crystal::Compiler::Source), String>:(Array(String) | Nil) at ??
0x9835fc: *Crystal::Command#build:Crystal::Compiler::Result at ??
0x7a6588: *Crystal::Command#run:(Array(Crystal::ImplementationTrace) | Array(Crystal::Init::View+:Class) | Array(String) | Bool | Crystal::Compiler::Result | Hash(String, String) | IO::FileDescriptor | Nil) at ??
0x747126: main at ??
0x7f0573915291: __libc_start_main at ??
0x70f19a: _start at ??
0x0: ??? at ??

Error: you've found a bug in the Crystal compiler.
Please open an issue, including source code that will allow us to reproduce the bug:
https://github.com/crystal-lang/crystal/issues

Without the -d flag 0.20.0 works fine:

$ ./test 
1

The previous version (0.19.4) didn't show any problem with -d flag.

[faustinoaq]

crystal 0.20.1 works fine now, Was this bug fixed?

[asterite]

@faustinoaq Crystal 0.20.1 still triggers the error for me, but it's fixed in master. Try doing crystal foo.cr -d or crystal foo.cr -d --emit llvm-ir