Peter:

I do not know why you are seeing this change in behavior.  In order to see
if I could determine why, I created my own unit test based on your
description, but when I run my incorrectly unit test with Clojure
1.10.0-alpha6 or 1.10.0-alpha7, I get the same results -- no failures, and
no "error: java.lang.Exception: = expects more than one argument" exception
as you are seeing.  I am probably doing something too different from your
code.

I created a tiny test repo on Github with what I tried, here:
https://github.com/jafingerhut/catch-bad-unit-test

Here is the unit test I tried:
https://github.com/jafingerhut/catch-bad-unit-test

where the definitions of functions x and y are simply these:
https://github.com/jafingerhut/catch-bad-unit-test/blob/master/src/catchme/core.clj#L3-L7

If you have a few minutes to try out the tests in my repo to see if you get
different results than I did, I'd be curious to hear if your results are
different.  I'd be more curious to learn of a way to write a unit test that
gives the exception you see with Clojure 1.10.0-alpha7.

Andy


On Thu, Sep 6, 2018 at 4:34 AM Peter Hull <peterhul...@gmail.com> wrote:

> On Wednesday, 5 September 2018 13:39:36 UTC+1, stuart....@gmail.com wrote:
>>
>> 1.10.0-alpha7 includes the following changes since 1.10.0-alpha6:
>>
>
> I was pleased to see that going from alpha 6 to 7 found an error in one of
> my tests. I had something like
> (is (= (x (func y))))
> and the new version reports
>
>>  error: java.lang.Exception: = expects more than one argument
>>
>
> But (purely for my own interest) I tried to discover which change in
> clojure source made the difference and I couldn't.
>
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