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Agda is a dependently typed programming language / interactive theorem prover.

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Testsuite: heads up: with GHC 9.10, `throw` will print a callstack

andreasabel opened this issue · comments

commented

agda/src/full/Agda/Utils/IO/UTF8.hs

Line 70 in 8c413d4

Left _ -> throw $ DecodingError file

This will produce for issue #4506:

Failed to read .../test/Fail/Issue4506.agda.
Please ensure that this file uses the UTF-8 character encoding.
HasCallStack backtrace:
  collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:92:13 in ...
  toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:84:32 in ...
  throw, called at src/full/Agda/Utils/IO/UTF8.hs:70:16 in ....

I recall discussing with @nad the choice or error reporting here, we might want to return Nothing here instead and let Agda handle it further up, or catch this exception and print it without a stack trace.