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roeekalinsky's avatar
roeekalinsky
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5 years ago
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Bug report: Quartus Pro version 20.3/20.4 synthesis crashes on VHDL recursive function calls with...

Bug report: Quartus Pro Edition version 20.3 and 20.4 crashes during synthesis ("Fatal Error: Segment Violation") on VHDL recursive function calls with a intermediate values set to a constant or to...
  • roeekalinsky's avatar
    roeekalinsky
    4 years ago

    Thank you, @KennyTan_Altera.

    Yes, it appears that this bug has been fixed. And not just in this most recent release (21.3). It was already fixed in the previous release (21.2).

    Thanks,

    -Roee

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roeekalinsky
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5 years ago

Gladly.

For the workaround, instead of assigning the value to a constant, assign it to a variable, with the assignment done in the body of the function. See attached.

Note that the assignment of the value to the variable must be done in the body of the function, must not be done as an initial value assignment in the declarative part of the function, as the latter results in the same crash as setting a constant.

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roeekalinsky
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5 years ago

Also, oops, just noticed an error in my original post.

quartus -t example.tcl

Should have been:

quartus_sh -t example.tcl

to run Quartus in shell mode for the example provided. No need to bring up the GUI.