strictFuncs: cannot import critbits

[ee7]

Example

Compile the below with nim c --experimental:strictFuncs

import critbits

Current Output

/nim/pure/collections/critbits.nim(529, 6) Error: 'toCritBitTree' can have side effects

Expected Output

No error.

Additional Information

toCritBitTree is defined here:

Nim/lib/pure/collections/critbits.nim

Lines 521 to 534 in 111092e

	func toCritBitTree*[T](pairs: openArray[(string, T)]): CritBitTree[T] {.since: (1, 3).} =
	## Creates a new `CritBitTree` that contains the given `pairs`.
	runnableExamples:
	doAssert {"a": "0", "b": "1", "c": "2"}.toCritBitTree is CritBitTree[string]
	doAssert {"a": 0, "b": 1, "c": 2}.toCritBitTree is CritBitTree[int]
	for item in pairs: result.incl item[0], item[1]
	func toCritBitTree*(items: openArray[string]): CritBitTree[void] {.since: (1, 3).} =
	## Creates a new `CritBitTree` that contains the given `items`.
	runnableExamples:
	doAssert ["a", "b", "c"].toCritBitTree is CritBitTree[void]
	for item in items: result.incl item

Nim version

This issue occurs with the latest devel commit (111092e), but not in Nim 1.4.2.

Edit: I have confirmed that this issue was introduced by 2aed418.