# 075: [a] = "xy" matched incorrectly
[↑up](bunny_notes)

- issued: 2020-05-14
- type： sample code failed
- status: Open

## Overview

Following program should cause an error, but executed incorrectly:

$$<pre>{
main = print a
  where [a] = "xy"
$$}

With Bunny 0.9.0, the program prints $<verb>{'x'}.

## 調査ログ
### 2021-10-24

ひさびさの全 issue 状況確認の一環で。

$$<pre>{
unno@unno-FMVD70GN7G ~/work/bissues/075 
$ cat b075.hs 
main = print a
  where [a] = "xy"
unno@unno-FMVD70GN7G ~/work/bissues/075 
$ runhaskell b075.hs 
b075.hs: b075.hs:2:9-18: Non-exhaustive patterns in [a]

unno@unno-FMVD70GN7G ~/work/bissues/075 
$ ~/prj/bunny/compiler/bin/bunny testrun b075.hs 
/home/unno/prj/bunny/compiler/bin/bunnyc -d ./jout/b075 --xno-implicit-prelude /home/unno/prj/bunny/compiler/bin/../lib/Prelude.hs
/home/unno/prj/bunny/compiler/bin/bunnyc -d ./jout/b075 --xlibrary-path /home/unno/prj/bunny/compiler/bin/../lib b075.hs
'x'
$$}