Fix bug in pvec pop resulting in empty tail
#64
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When calling `pop` on a persistent vector with, eg., 33 elements, we have a `tail` of length 1. After this `pop` call, there was a bug where the resulting pvec had a tail of length `0` rather than a tail of length `32`. This causes errors, for instance when calling `iterate`, which expects a nonempty tail. This PR fixes the behavior by adding a branch in `pop` function for when the tail length is currently `1` (in which case we make the new tail be `pop(trie)`).
Update PersistentVectorTest.jl
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(just added a test for this behavior) |
Codecov Report
@@ Coverage Diff @@
## master #64 +/- ##
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+ Coverage 77.30% 78.38% +1.07%
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Files 7 7
Lines 379 384 +5
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+ Hits 293 301 +8
+ Misses 86 83 -3
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When calling
popon a persistent vector with, eg., 33 elements, we have atailof length 1. After thispopcall, there was a bug where the resulting pvec had a tail of length0rather than a tail of length32. This causes errors, for instance when callingiterate, which expects a nonempty tail. This PR fixes the behavior by adding a branch inpopfunction for when the tail length is currently1(in which case we make the new tail bepop(trie)).