The 0.15.0 version, using httpclient, using --threads:on compile time error.

[lihf8515]

The 0.15.0 version, using httpclient, using --threads:on compile time error: 
    
    
    d:\tool\developer\nim0.15.0\lib\pure\asyncmacro.nim(31, 8) Error: 'cb' is 
not GC-safe as it accesses 'nameIterVar' which is a global using GC'ed memory.