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Crash related to external name #1062

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jorkrohn opened this issue Nov 8, 2024 · 0 comments
Closed

Crash related to external name #1062

jorkrohn opened this issue Nov 8, 2024 · 0 comments

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@jorkrohn
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jorkrohn commented Nov 8, 2024

I came across a crash related to external names:

nvc_crash.vhd:

library ieee;
use ieee.std_logic_1164.all;

entity nvc_crash is
end entity nvc_crash;

architecture rtl of nvc_crash is
  signal test_signal : std_logic;
begin
end architecture rtl;

nvc_crash_tb.vhd:

library ieee;
use ieee.std_logic_1164.all;

entity nvc_crash_tb is
  generic(
    ENABLE_EXTERNAL_NAME : boolean := true
  );
end entity nvc_crash_tb;

architecture rtl of nvc_crash_tb is

  signal test_signal : std_logic;

begin

  g_external_name : if ENABLE_EXTERNAL_NAME generate
  begin
    test_signal <= <<signal .nvc_crash_tb.i_nvc_crash.test_signal : std_logic>>;
  end generate g_external_name;

  i_nvc_crash : entity work.nvc_crash;

end architecture rtl;

I get the crash report:

*** Caught exception c0000005 (EXCEPTION_ACCESS_VIOLATION) [address=0000000000000008, ip=00007FF68C4E423B] ***

[00007FF68C330600]
[00007FF68C3309B9]
[00007FFD31FCB21C] UnhandledExceptionFilter+0x1ec
[00007FFD347197FD] RtlCopyMemory+0x2bbd
[00007FFD346FF687] _C_specific_handler+0x97
[00007FFD3471517F] _chkstk+0x12f
[00007FFD3468E856] RtlFindCharInUnicodeString+0xa96
[00007FFD3471416E] KiUserExceptionDispatcher+0x2e
[00007FF68C4E423B] _nvc_get_object+0x156b
[00007FF68C4E2999] _nvc_do_exit+0x7b9
[00007FF68C4D29EB] vhpi_is_printable+0xaad6b
[00007FF68C40F4F7] std_env_get_assert_format+0x77c7
[00007FF68C3F7D55] nvc_current_delta+0x2805
[00007FF68C3F7C60] nvc_current_delta+0x2710
[00007FF68C3F7C60] nvc_current_delta+0x2710
[00007FF68C3F7395] nvc_current_delta+0x1e45
[00007FF68C3293F0]
[00007FF68C32783A]
[00007FF68C3287DA]
[00007FF68C3287DA]
[00007FF68C3223BB]
[00007FF68B154A63]
[00007FF68B154AC6]
[00007FFD32E5257D] BaseThreadInitThunk+0x1d

nvc 1.14.1 (1.14.1.r0.ge10a10e8) (Using LLVM 18.1.8) [x86_64-w64-mingw32]

Please report this bug at https://github.com/nickg/nvc/issues

It seems to only happen when the external name is within a generate and it's above the entity instantiation. If I either move the external name out from the generate or move the entity instantiation above the generate, it works fine.

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