Error deleting file *.lock about crun HOT 3 CLOSED

> make tests
crystal tool format -i src -i spec
crun format passed
rm -f crun crun.sha256
crun clean passed
crystal build src/main.cr -o crun --warnings all --error-on-warnings --error-trace
crun build passed
crystal spec --debug --warnings all --error-on-warnings --error-trace
.....error:
Failed to raise an exception: END_OF_STACK
[0x56511fbb0e76] *CallStack::print_backtrace:Int32 +118
[0x56511fb93006] __crystal_raise +86
[0x56511fb9352e] ???
[0x56511fbe0966] *Crystal::System::File::open<String, String, File::Permissions>:Int32 +214
[0x56511fbd9c83] *File::new<String, String, File::Permissions, Nil, Nil>:File +67
[0x56511fba7b1d] *CallStack::read_dwarf_sections:(Array(Tuple(UInt64, UInt64, String)) | Nil) +109
[0x56511fba78ad] *CallStack::decode_line_number<UInt64>:Tuple(String, Int32, Int32) +45
[0x56511fba7038] *CallStack#decode_backtrace:Array(String) +296
[0x56511fba6ef2] *CallStack#printable_backtrace:Array(String) +50
[0x56511fc1560d] *Exception+ +77
[0x56511fc15458] *Exception+ +120
[0x56511fc115da] *AtExitHandlers::run<Int32>:Int32 +490
[0x56511fc514ab] *Crystal::main<Int32, Pointer(Pointer(UInt8))>:Int32 +139
[0x56511fb9da16] main +6
[0x7f988572d09b] __libc_start_main +235
[0x56511fb9188a] _start +42
[0x0] ???
Crun::BuildError: Build failed: crystal build --debug --error-on-warnings --error-trace -o /tmp/.lgmAAIcrun_spec_local_cache/foo__path_to_crystal_crun_spec_samples_pipe_echo_cr/echo.cr.crystal /path/to/crun/spec/samples/pipe/echo.cr

STDOUT:


STDERR:
In /path/to/crun/spec/samples/pipe/echo.cr:1:1

 1 | while line = gets
     ^
Error: can't find file 'prelude'

If you're trying to require a shard:
- Did you remember to run `shards install`?
- Did you make sure you're running the compiler in the same directory as your shard.yml?