Update of bug #68420 (group groff):
Severity: 3 - Normal => 4 - Important
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Follow-up Comment #1:
[comment #0 original submission:]
> I don't know if this is sensible input,
Input can be utter nonsense and there still shouldn't be an assertion failure.
This means the code is following a path the developers thought impossible.
I can replicate your results, using an even more minimal example. I see the
failure in 1.24.0, and, as you report, not in 1.23.
$ groff <<END
.cc '
'cc
END
troff:<standard input>:1: error: ignoring control character change request;
the no-break control character is already "'"
troff: ../src/roff/troff/input.cpp:298: void
assign_control_character_request(): Assertion `assignment_worked' failed.
groff: error: troff: Aborted
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