nimwc Error: GC-safe as it accesses global using GC'ed memory or as it calls fn

[prasad83]

With nim version 2.0

After fixing: (datetime2human MR) + (nim_websitecreator MR)

./nimwc gives the following error

std/asyncmacro(250, 31) Error: 'matchMatcher (Async)' is not GC-safe as it accesses 'storageEFS' which is a global using GC'ed memory

To fix this variable has to be declared as threadvar and initialized later (without using let)

var storageEFS* {.threadvar.}: string
storageEFS = block:
   ...
   path

./nimwc will now result in error

std/asyncmacro(250, 31) Error: 'matchMatcher (Async)' is not GC-safe as it calls 'sendEmailActivationManual'

To fix this proc has to marked as .gcsafe along with .async

proc sendEmailActivationManual*(email, userName, password, activateUrl, invitorName: string) {.async, gcsafe.} =

./nimwc will now result in error

std/asyncmacro(250, 31) Error: 'sendEmailActivationManual (Async)' is not GC-safe as it calls 'genEmailMessage'

proc genEmailMessage*(msgContent: string): string {.inline, .gcsafe.} =

If proc marked as gcsafe depends on global variable then they should be declared as {.threadvar.} and initialized safely.