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From: "gprocida at google dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/28013] abidiff assertion failure
Date: Sat, 26 Jun 2021 05:46:28 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28013

--- Comment #1 from gprocida at google dot com ---
Here's a minimal test case.

$ head fn_variadic_c.{0,1}.c; for i in 0 1; do gcc -Wall -Wextra -g -c
fn_variadic_c.$i.c; ~/android/libabigail/build/tools/abidw fn_variadic_c.$i=
.o >
fn_variadic_c.$i.abi; done; head -50 fn_variadic_c.{0,1}.abi;
~/android/libabigail/build/tools/abidiff fn_variadic_c.{0,1}.abi
=3D=3D> fn_variadic_c.0.c <=3D=3D
int foo(int x, int y) { return x + y; }

=3D=3D> fn_variadic_c.1.c <=3D=3D
int foo(int x, ...) { return x; }
=3D=3D> fn_variadic_c.0.abi <=3D=3D
<abi-corpus version=3D'2.0' path=3D'fn_variadic_c.0.o'
architecture=3D'elf-amd-x86_64'>
  <elf-function-symbols>
    <elf-symbol name=3D'foo' type=3D'func-type' binding=3D'global-binding'
visibility=3D'default-visibility' is-defined=3D'yes'/>
  </elf-function-symbols>
  <abi-instr address-size=3D'64' path=3D'fn_variadic_c.0.c' comp-dir-path=
=3D'/tmp'
language=3D'LANG_C99'>
    <type-decl name=3D'int' size-in-bits=3D'32' id=3D'type-id-1'/>
    <function-decl name=3D'foo' mangled-name=3D'foo'
filepath=3D'/tmp/fn_variadic_c.0.c' line=3D'1' column=3D'1' visibility=3D'd=
efault'
binding=3D'global' size-in-bits=3D'64' elf-symbol-id=3D'foo'>
      <parameter type-id=3D'type-id-1' name=3D'x' filepath=3D'/tmp/fn_varia=
dic_c.0.c'
line=3D'1' column=3D'1'/>
      <parameter type-id=3D'type-id-1' name=3D'y' filepath=3D'/tmp/fn_varia=
dic_c.0.c'
line=3D'1' column=3D'1'/>
      <return type-id=3D'type-id-1'/>
    </function-decl>
  </abi-instr>
</abi-corpus>

=3D=3D> fn_variadic_c.1.abi <=3D=3D
<abi-corpus version=3D'2.0' path=3D'fn_variadic_c.1.o'
architecture=3D'elf-amd-x86_64'>
  <elf-function-symbols>
    <elf-symbol name=3D'foo' type=3D'func-type' binding=3D'global-binding'
visibility=3D'default-visibility' is-defined=3D'yes'/>
  </elf-function-symbols>
  <abi-instr address-size=3D'64' path=3D'fn_variadic_c.1.c' comp-dir-path=
=3D'/tmp'
language=3D'LANG_C99'>
    <type-decl name=3D'int' size-in-bits=3D'32' id=3D'type-id-1'/>
    <type-decl name=3D'variadic parameter type' id=3D'type-id-2'/>
    <function-decl name=3D'foo' mangled-name=3D'foo'
filepath=3D'/tmp/fn_variadic_c.1.c' line=3D'1' column=3D'1' visibility=3D'd=
efault'
binding=3D'global' size-in-bits=3D'64' elf-symbol-id=3D'foo'>
      <parameter type-id=3D'type-id-1' name=3D'x' filepath=3D'/tmp/fn_varia=
dic_c.1.c'
line=3D'1' column=3D'1'/>
      <parameter is-variadic=3D'yes'/>
      <return type-id=3D'type-id-1'/>
    </function-decl>
  </abi-instr>
</abi-corpus>
abidiff: ../../src/abg-ir.cc:24767: size_t
abigail::ir::hash_as_canonical_type_or_constant(const abigail::ir::type_bas=
e*):
Assertion `__abg_cond__' failed.
Aborted

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