Re: Guidance requested on narrowing down internal compiler error

[john o goyo]

Greetings, Gaius.

On 2024-04-02 18:56, Gaius Mulley wrote:
> Hi John,
>
> I've git pushed the m2 trace flag -fm2-debug-trace=all,quad,line,token
> to help track down the ICE
>
> regards,
> Gaius

I tried tracing all.  Output is voluminous, so I piped it to a file.  
Here is an extract therefrom:

./MCPublic.def:39:    Statset = SET OF Compilerstatus;
./MCPublic.def:39:    Statset = SET OF Compilerstatus;
./MCPublic.def:39:    ^^^^^^^
./MCPublic.def:39:4051
./MCPublic.def:39:    Statset = SET OF Cotoken: 3
token: 4
token: 5
token: 6
token: 7
[...]
token: 4085
token: 4086
token: 4087
token: 4088
token: 3
token: 4
token: 5
token: 6
token: 7
[...]
token: 1358
token: 1359
token: 1360cc1gm2: internal compiler error: not implemented yet
0x6d35cf m2linemap_internal_error
/home/build/opt/gcc/src/gcc-git/gcc/m2/gm2-gcc/m2linemap.cc:253

As this does not seem to help me, I searched for occurrences of "not 
implemented yet" and found them in gcc/m2/gm2-compiler/SymbolTable.mod.  
Adding some procedure context, the problem seems to be in the procedure 
GetScope.  The function GetPsym returns something not found in the CASE 
statement.

So I tried to add more context, viz.

      ELSE
         snprintf(msg, 120, "GetScope: GetPsym(%d) returned known 
SymbolType %d",
                 ORD(Sym), ORD(SymbolType));
         InternalError (msg);
      END

But this fails to compile as follows.

m2/gm2-compiler-boot/SymbolTable.c: In function unsigned int 
SymbolTable_GetScope(unsigned int):
m2/gm2-compiler-boot/SymbolTable.c:18105:24: error: invalid cast from 
type GetScope__T8 {aka SymbolTable_GetScope(unsigned 
int)::GetScope__T8_a} to type void*
18105 |         libc_snprintf (reinterpret_cast<void *> (msg), 
static_cast<size_t> (120), (const char *) "GetScope: GetPsym(%d) 
returned uknown SymbolType %d", 51, ((unsigned int) (Sym)), ((unsigned 
int) (pSym->SymbolType)));
      |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
m2/gm2-compiler-boot/SymbolTable.c: At global scope:
m2/gm2-compiler-boot/SymbolTable.c:5973:21: warning: NameKey_Name 
GetConstStringContent(unsigned int) defined but not used [-Wunused-function]
 5973 | static NameKey_Name GetConstStringContent (unsigned int sym)

The local variable msg is defined as an array of characters.

At this point, I am confused.  Is my invocation of snprintf() not correct?

Sincerely,
john