Fix a crash when using a constant global variable (created via MakeConstantGlobal
, such as IsHPCGAP
) as index variable of a for
loop
#3808
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The reader ("parser") did not sufficiently restrict the kind of expression
permitted as index variable in
for
loops. So one could enter e.g. this:The result was a nonsensical error message. Worse, one could specify a
"constant" variable, which caused a segfault; e.g.
Text for release notes
Fixed a crash when using a constant global variable (created via
MakeConstantGlobal
) as index variable of a for loop.