[fpc-devel] 3.3.1 Access violation during compile

[J. Gareth Moreton]

That's a litle concerning:

   $0000000100089CA3  OwnerHierarchyName,  line 2180 of symdef.pas

Lines 2179 and 2180 of that file are the following:

           if assigned(tmp.owner) and
              (tmp.owner.symtabletype in 
[ObjectSymtable,recordsymtable]) then

Since the access violation doesn't occur on 2179, that likely means 
tmp.owner contains a dangling pointer or hasn't been initialised to nil.

Gareth aka. Kit


On 30/06/2022 21:03, Martin Frb via fpc-devel wrote:
> My 3.3.1 build is from the 27th June.
> However the error did happened with the previous build too. (That is 
> according to error msg, I did not compare the trace).
>
> During a build of the Lazarus IDE, ppu files from the previous build 
> still in place. Just a handful of source files changed.
>
> There is no pattern to what needs to change.
> But the error seems to be bound to a handful of locations (actually, 
> not really checked, but I do notice it happens always in the same few 
> units / not sure of the pattern which one it happens in).
>
> In the below case, it is the first function in the "implementation" 
> section. ( ide\sourcefilemanager.pas(311,1) )
> The function itself has no reference to any of the changed units.
>
>
> (3104) Compiling sourcefilemanager.pas
> B:\lazarus_main\ide\sourcefilemanager.pas(4886,20) Hint: (5024) 
> Parameter "Sender" not used
> B:\lazarus_main\ide\sourcefilemanager.pas(5178,44) Hint: (5091) Local 
> variable "CompResourceCode" of a managed type does not seem to be 
> initialized
> B:\lazarus_main\ide\sourcefilemanager.pas(311,1) Error: (1026) 
> Compilation raised exception internally
> Fatal: (1018) Compilation aborted
> An unhandled exception occurred at $0000000100089CA3:
> EAccessViolation: Access violation
>   $0000000100089CA3  OwnerHierarchyName,  line 2180 of symdef.pas
>   $000000010008585D  typename,  line 406 of symtype.pas
>   $000000010029ECFB  beforeappenddef,  line 1822 of dbgdwarf.pas
>   $00000001000652AD  appenddef,  line 242 of dbgbase.pas
>   $00000001000655F1  write_remaining_defs_to_write,  line 314 of 
> dbgbase.pas
>   $00000001002A3E7D  inserttypeinfo,  line 3293 of dbgdwarf.pas
>   $0000000100226DE1  finish_unit,  line 1388 of pmodules.pas
>   $0000000100226776  proc_unit,  line 1158 of pmodules.pas
>   $000000010004CE50  compile,  line 403 of parser.pas
>   $000000010015D816  loadppu,  line 2289 of fppu.pas
>   $0000000100224DEE  loadunits,  line 542 of pmodules.pas
>   $000000010022600D  proc_unit,  line 1002 of pmodules.pas
>   $000000010004CE50  compile,  line 403 of parser.pas
>   $000000010015D816  loadppu,  line 2289 of fppu.pas
>   $0000000100224DEE  loadunits,  line 542 of pmodules.pas
>   $0000000100228A1D  proc_program,  line 2165 of pmodules.pas
>   $000000010004CEA1  compile,  line 411 of parser.pas
>
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