lent gives wrong results with -d:release

[timotheecour]

lent gives wrong results with -d:release

Example

proc byLent[T](a: T): lent T = a
block:
  let a = 10
  let a2 = byLent(a)
  doAssert a2 == a2, $a2 # ok
  doAssert byLent(a) == a, $byLent(a) # bug

Current Output

nim c -r -d:release -f t10897.nim
Error: unhandled exception: /Users/timothee/git_clone/nim/timn/tests/nim/all/t10897.nim(9, 12) `byLent(a) == a` 140732898775544 [AssertionDefect]

looks like it returns the address instead

Expected Output

works

Additional Information

• devel 0824fdd 1.3.5

[cooldome]

The issue here is the same as #14420

proc byLent[T](a: T): lent T = a

byLent contains stmtListExpr and stmtListExpr involves temporary object in backend

[timotheecour]

@cooldome if what you say were true, the same workaround would apply here, but this is not the case:
result = a still gives AssertionDefect

at the very least there is some different here (even if, perhaps, there is a common root cause)