Bug 22985 – dip1008 implementation uses the GC behind the scenes

int foo(int) @nogc { throw new Exception("huhu"); } void test() @nogc { try { foo(1); } catch(Exception e) { } } void main() { import std.stdio; import core.memory; auto stats1 = GC.stats(); test(); auto stats2 = GC.stats(); writeln(stats1); // Stats(0, 0, 0) writeln(stats2); // Stats(1376, 1047200, 1360) } Allocating the traceHandler still uses the GC

You probably could allocate the trace handler inline, either just have a static array (a certain length of stack information has no practical value anyway, so just truncating it surely good enough irl) or let the Exception dtor take care of it with a malloc/free pair internally on the private slice. I actually thought it used to do this but I might be remembering wrong.

Huh, I missed this one. This should be fixed in 2.102 with the new trace handler.