panic on macos

[lovasoa]

When running in debug mode, I get

thread 'main' panicked at 'assertion failed: backend.is_current()', /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/context/mod.rs:647:17
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
   1: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:70
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:58
             at src/libstd/panicking.rs:200
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:215
   4: <std::panicking::begin_panic::PanicPayload<A> as core::panic::BoxMeUp>::get
             at src/libstd/panicking.rs:478
   5: std::ffi::c_str::CString::as_bytes_with_nul
             at /rustc/2aa4c46cfdd726e97360c2734835aa3515e8c858/src/libstd/panicking.rs:412
   6: glium::context::Context::get_version
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/context/mod.rs:647
   7: glium::context::default_debug_callback::{{closure}}
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/context/mod.rs:951
   8: glium::texture::buffer_texture::BufferTextureRef::get_texture_type
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/context/mod.rs:217
   9: glium::backend::glutin::Display::new_inner
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/backend/glutin/mod.rs:115
  10: <&'b str as core::str::pattern::Pattern<'a>>::into_searcher
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/backend/glutin/mod.rs:94
  11: <&'b str as core::str::pattern::Pattern<'a>>::into_searcher
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/backend/glutin/mod.rs:79
  12: <&'b str as core::str::pattern::Pattern<'a>>::into_searcher
             at /Users/olojkine/.cargo/registry/src/github.aaakk.us.kg-1ecc6299db9ec823/glium-0.23.0/src/backend/glutin/mod.rs:71
  13: ifs_fractal::main
             at src/main.rs:25
  14: std::rt::lang_start::{{closure}}
             at /rustc/2aa4c46cfdd726e97360c2734835aa3515e8c858/src/libstd/rt.rs:64
  15: std::panicking::try::do_call
             at src/libstd/rt.rs:49
             at src/libstd/panicking.rs:297
  16: panic_unwind::dwarf::eh::read_encoded_pointer
             at src/libpanic_unwind/lib.rs:92
  17: <std::panicking::begin_panic::PanicPayload<A> as core::panic::BoxMeUp>::get
             at src/libstd/panicking.rs:276
             at src/libstd/panic.rs:388
             at src/libstd/rt.rs:48
  18: std::rt::lang_start
             at /rustc/2aa4c46cfdd726e97360c2734835aa3515e8c858/src/libstd/rt.rs:64
  19: ifs_fractal::main

[lovasoa]

The error disappears in release mode.

[jherman3]

Very strange, it looks like an upstream issue with Glium or Glutin but I'll investigate a bit when I get a chance

[lovasoa]

The source of this seems to be glium/glium#1721