foldr raises IndexError when called on sequence

[refracted]

Example

echo toSeq(1..10).foldr(a + b)

Current Output

Error: unhandled exception: index 10 not in 0 .. 9 [IndexError]

Expected Output

55

What works

The following all work as expected.

echo foldr(toSeq(1..10), a + b)

echo foldl(toSeq(1..10), a + b)

echo toSeq(1..10).foldl(a + b)

nim version

$ nim -v
Nim Compiler Version 1.2.0 [Linux: amd64]

[timotheecour]

woks at proc scope, fails at module and block scope (as of 16003bf 1.3.5)

import sequtils
template fun = echo toSeq(1..10).foldr(a + b)
proc main=fun()
main() # works
block: fun() # fails
fun() # fails

@refracted always check against latest devel when reporting issues (in this case it does fail in devel, but oftentimes it's a bug that was recently fixed in devel); also make sure example is self contained (i had to add import sequtils); other than that it's a good, valid bug report