Stack-checkpoint error: two values in single value context on v7.5.0.8 [cs]

[joergen7]

Racket: version 7.5.0.8--2019-12-04(-/f) [cs]
git sha1 id: 22387af
OS: Xubuntu 19.10
gcc: version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2) Target: x86_64-linux-gnu
platform: Intel Core i7-2600

Error description

Compiling one of my projects in DrRacket I get the following error:

../../racket/racket/share/pkgs/drracket/drracket/private/stack-checkpoint.rkt:40:30: returned two values to single value return context

Reproducing the error

• Download the project from https://github.com/joergen7/cfplot
• Open Drracket with the drracketcs command
• Open the source file cfplot.rkt
• Type check with [F6]

Run with [F5] produces the following error message (as before):

../../racket/racket/share/pkgs/drracket/drracket/private/stack-checkpoint.rkt:40:30: returned two values to single value return context

This is also the only entry in the backtrace.

Observation

On the Command Line it works

Surprisingly, compiling the tool on the command line and running it with an example input works fine.

racocs make -j 8 *.rkt
racocs exe cfplot.rkt
./cfplot examples/2019-01-17-variant-call-varscan-gruenau-4x120-2x32-2x16-gluster4.json

Thus, I suspect that the problem is related to DrRacket.

Disabling Debugging makes it Work

Disabling debugging in DrRacket's language menu makes the error go away.

[mflatt]

Thanks for the report!