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discard """
output: '''success'''
"""
# bug #3804
#import sequtils
type AnObj = ref object
field: string
#proc aBug(objs: seq[AnObj]) {.compileTime.} =
# discard objs.mapIt(it.field & " bug")
proc sameBug(objs: seq[AnObj]) {.compileTime.} =
var strSeq = newSeq[string](objs.len)
strSeq[0] = objs[0].field & " bug"
static:
var objs: seq[AnObj] = @[]
objs.add(AnObj(field: "hello"))
sameBug(objs)
# sameBug(objs)
echo objs[0].field
doAssert(objs[0].field == "hello") # fails, because (objs[0].field == "hello bug") - mutated!
echo "success"
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