Bug 6260 – [Memory Corruption] Passed around lazy arguments don't work with closures

Tested in DMD 2.053: auto foo(lazy int x){return {return x;};} auto bar(lazy int x){return foo(x);} void main(){assert(foo(1)()==bar(1)());} // assertion failure Workaround: auto foo(lazy int x){return {return x;};} auto bar(lazy int x){return foo({return x;}());} // destroy purpose of 'lazy' void main(){assert(foo(1)()==bar(1)());} // pass Some funny stuff: import std.stdio; void main(){ auto x=bar(1); writeln(x()); } writes: <Garbage integer value> 0 Where does "0" come from? void main(){ writeln(bar(1)()); } writes: <Garbage integer value> Segmentation Fault

lazy arguments are implicitly scoped, so this is by design.