[LAC-Tech]

I am not aware of a common issue like that but D has bugs.

Not an error I suppose, but doesn't fill me with confidence nonetheless.

$ dub test No source files found in configuration 'library'. Falling back to "dub -b unittest". Performing "unittest" build using /home/lewis/dlang/dmd-2.100.2/linux/bin64/dmd for x86_64. myproject ~master: building configuration "application"... Linking... Running myproject Hello world! (dmd-2.100.2)[lewis@lightgrey myproject]$ micro source/app.d (dmd-2.100.2)[lewis@lightgrey myproject]$ dub test No source files found in configuration 'library'. Falling back to "dub -b unittest". Performing "unittest" build using /home/lewis/dlang/dmd-2.100.2/linux/bin64/dmd for x86_64. myproject ~master: building configuration "application"... Linking... Running myproject core.exception.AssertError@source/app.d(9): unittest failure ---------------- ??:? _d_unittestp [0x555fe0e339b1] source/app.d:9 void app.__unittest_L8_C1() [0x555fe0e328b8] ??:? void app.__modtest() [0x555fe0e33888] ??:? int core.runtime.runModuleUnitTests().__foreachbody6(object.ModuleInfo) [0x555fe0e3d9c2] ??:? int object.ModuleInfo.opApply(scope int delegate(object.ModuleInfo)).__lambda2(immutable(object.ModuleInfo)) [0x555fe0e3b88f] ??:? int rt.minfo.moduleinfos_apply(scope int delegate(immutable(object.ModuleInfo))).__foreachbody2(ref rt.sections_elf_shared.DSO) [0x555fe0e42a83] ??:? int rt.sections_elf_shared.DSO.opApply(scope int delegate(ref rt.sections_elf_shared.DSO)) [0x555fe0e42f5b] ??:? int rt.minfo.moduleinfos_apply(scope int delegate(immutable(object.ModuleInfo))) [0x555fe0e42a11] ??:? int object.ModuleInfo.opApply(scope int delegate(object.ModuleInfo)) [0x555fe0e3b861] ??:? runModuleUnitTests [0x555fe0e3d80e] ??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int function(char[][])).runAll() [0x555fe0e342d8] ??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int function(char[][])).tryExec(scope void delegate()) [0x555fe0e34265] ??:? _d_run_main2 [0x555fe0e341ce] ??:? _d_run_main [0x555fe0e33f97] /home/lewis/dlang/dmd-2.100.2/linux/bin64/../../src/druntime/import/core/internal/entrypoint.d:29 main [0x555fe0e328dd] ??:? __libc_start_main [0x7f1a0be25e09] ../sysdeps/x86_64/start.S:120 _start [0x555fe0e327c9] 1/1 modules FAILED unittests Program exited with code 1

[destructionator]

Is this one of the dub hello worlds? Looks like it.... but it also says line 8 and the built in thing doesn't have a line 8. So what is the code there? If it is `assert(0)`, you're seeing the result of the test. The info is a bit spammy since it prints all the mostly-useless stack trace but there's some situations beyond hello world where the extra info helps explain why the test failed.

[LAC-Tech]

It is.

If the default project manager barfs out all of that - ??? and all - when you write a simple hello world project with a failing test...

Well I'm not filled with confidence. If you discover such a lack of care at that early of a stage, god knows what it'll be like when you actually start solving problems.