The test suite below[1] does what it's supposed to. The last line of it is a commented-out test case: -- assertBool "broken" $ True If I uncomment that, it fails to compile: > :reload [13 of 13] Compiling TParse ( test/TParse.hs, interpreted ) test/TParse.hs:67:3: error: parse error on input ‘assertBool’ | 67 | assertBool "broken" $ True | ^^^^^^^^^^ Failed, 12 modules loaded. > However, if I move it to somewhere earlier in the code, it works. [1] https://github.com/JeffreyBenjaminBrown/digraphs-with-text/blob/e5afd39b9507... -- Jeff Brown | Jeffrey Benjamin Brown Website https://msu.edu/~brown202/ | Facebook https://www.facebook.com/mejeff.younotjeff | LinkedIn https://www.linkedin.com/in/jeffreybenjaminbrown(spammy, so I often miss messages here) | Github https://github.com/jeffreybenjaminbrown