Bug#876702: haskell-language-python FTBFS: Couldn't match type `t146' with `[Either a30 [Statement SrcSpan]]'

[Adrian Bunk]

Source: haskell-language-python
Version: 0.5.4-4
Severity: serious
Tags: buster sid

Some recent change in unstable makes haskell-language-python FTBFS:

https://tests.reproducible-builds.org/debian/history/haskell-language-python.html
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/haskell-language-python.html

...
[17 of 23] Compiling Language.Python.Version2.Parser.Parser ( dist-ghc/build/Language/Python/Version2/Parser/Parser.hs, dist-ghc/build/Language/Python/Version2/Parser/Parser.o )

dist-ghc/build/Language/Python/Version2/Parser/Parser.hs:2171:17: error:
    * Couldn't match type `t146'
                     with `[Either a30 [Statement SrcSpan]]'
      `t146' is a rigid type variable bound by
        the type signature for:
          happyReduce_7 :: forall t127 t143 t144 t145 t146 t147 t148 t149 t150 t151 t152 t153 t154 t155 t156 t157 t158 t159 t160 t161 t162 t163 t164 t165 t166 t167 t168 t169 t170 t171 t172 t173 t174 t175 t176 t177 t178 t179 t180 t181 t182 t183 t184 t185 t186 t187 t188 t189 t190 t191 t192 t193 t194 t195 t196 t197 t198 t199 t200 t201 t202 t203 t204 t205 t206 t207 t208 t209 t210 t211 t212 t213 t214 t215 t216 t217 t218 t219 t220 t221 t222 t223 t224 t225 t226 t227 t228 t229 t230 t231 t232 t233 t234 t235 t236 t237 t238 t239 t240 t241 t242 t243 t244 t245 t246 t247 t248 t249 t250 t251 t252 t253 t254 t255 t256 t257 t258 t259 t260 t261 t262 t263 t264 t265 t266 t267 t268 t269 t270 t271 t272.
                           Happy_GHC_Exts.Int#
                           -> Token
                           -> Happy_GHC_Exts.Int#
                           -> Happy_IntList
                           -> HappyStk
                                (HappyAbsSyn
                                   t127
                                   t143
                                   t144
...