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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/64256] [5.0 Regression] Pointer Bounds Checker builtins enum overflows stabstring length
Date: Wed, 10 Dec 2014 16:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64256

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So are we talking about something like:
#define A(n) EEEEEEEEEE##n,
#define B(n) A(n##0) A(n##1) A(n##2) A(n##3) A(n##4) \
A(n##5) A(n##6) A(n##7) A(n##8) A(n##9)
#define C(n) B(n##0) B(n##1) B(n##2) B(n##3) B(n##4) \
B(n##5) B(n##6) B(n##7) B(n##8) B(n##9)
#define D(n) C(n##0) C(n##1) C(n##2) C(n##3) C(n##4) \
C(n##5) C(n##6) C(n##7) C(n##8) C(n##9)
#define E(n) D(n##0) D(n##1) D(n##2) D(n##3) D(n##4) \
D(n##5) D(n##6) D(n##7) D(n##8) D(n##9)
#define F(n) E(n##0) E(n##1) E(n##2) E(n##3) E(n##4) \
E(n##5) E(n##6) E(n##7) E(n##8) E(n##9)
enum E
{
  F(1)
  EEEEEEEEEElast
};
enum E
foo (enum E x)
{
  return x;
}

-gstabs+ ? One .stabs line in there is 2288953 bytes long.  Looking around,
this is a well known problem for 13 years at least, just nothing has been done
about it: PR2714 .