Crystal Compiler error: Module validation failed: GEP base pointer is not a vector or a vector of pointers

[stephannv]

Bug Report

Reproducible in: 1.13.2, 1.12.1 (I didn't try other versions). I could reproduce it on apple silicon and crystal playground.

I'm not sure if this is related to #14984, but the error message is different.

Playground here: https://play.crystal-lang.org/#/r/h5y7

class Bar
  getter list : Enumerable(String | Path) | Enumerable(String) | Enumerable(Path)

  def initialize(@list); end

  def self.bar(*elements : String | Path)
    bar(elements)
  end

  def self.bar(list : Enumerable)
    new(list)
  end
end

Bar.bar("hello")

Complete stacktrace

Module validation failed: GEP base pointer is not a vector or a vector of pointers
  %17 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %16, i32 0, i32 0, !dbg !18
Load operand must be a pointer.
  %18 = load i32, %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %17, align 4, !dbg !18
GEP base pointer is not a vector or a vector of pointers
  %19 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %16, i32 0, i32 1, !dbg !18
GEP base pointer is not a vector or a vector of pointers
  %27 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %26, i32 0, i32 0, !dbg !18
Load operand must be a pointer.
  %28 = load i32, %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %27, align 4, !dbg !18
GEP base pointer is not a vector or a vector of pointers
  %29 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %26, i32 0, i32 1, !dbg !18
GEP base pointer is not a vector or a vector of pointers
  %37 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %36, i32 0, i32 0, !dbg !18
Load operand must be a pointer.
  %38 = load i32, %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %37, align 4, !dbg !18
GEP base pointer is not a vector or a vector of pointers
  %39 = getelementptr inbounds %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))", %"(Array(String) | Dir | Dir::ChildIterator | Dir::EntryIterator | Path::PartIterator | String::LineIterator | Tuple(String) | Tuple(String, String, String) | Tuple(String, String, String, String))" %36, i32 0, i32 1, !dbg !18
 (Exception)
  from [...]/bin/crystal in 'raise<Exception>:NoReturn'
  from [...]/bin/crystal in 'raise<String>:NoReturn'
  from [...]/bin/crystal in 'Crystal::Compiler#codegen<Crystal::Program, Crystal::ASTNode+, Array(Crystal::Compiler::Source), String>:(Tuple(Array(Crystal::Compiler::CompilationUnit), Array(String)) | Nil)'
  from [...]/bin/crystal in 'Crystal::Compiler#compile<Array(Crystal::Compiler::Source), String>:Crystal::Compiler::Result'
  from [...]/bin/crystal in 'Crystal::Command::run<Array(String)>:(Bool | Crystal::Repl::Value | Nil)'
  from [...]/bin/crystal in '__crystal_main'
  from [...]/bin/crystal in 'main'
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

[devnote-dev]

Seems to be another version of #13890.