On Thursday 29 November 2007 20:34:17 Will Coleda wrote: > On feather, languages/c99 (et al.) fail with: > > $ make > ../../parrot -o src/CPP_PGE2AST.pbc --output-pbc src/CPP_PGE2AST.pir > *** glibc detected *** ../../parrot: double free or corruption > (fasttop): 0x0823e328 *** > > running this through gdb, I get: > > bt > #0 0xb7f41402 in __kernel_vsyscall () > #1 0xb6f77a85 in raise () from /lib/i686/nosegneg/libc.so.6 > #2 0xb6f794e1 in abort () from /lib/i686/nosegneg/libc.so.6 > #3 0xb6faf7dc in __libc_message () from /lib/i686/nosegneg/libc.so.6 > #4 0xb6fb7755 in _int_free () from /lib/i686/nosegneg/libc.so.6 > #5 0xb6fbb270 in free () from /lib/i686/nosegneg/libc.so.6 > #6 0xb7e75ad5 in read_macro (valp=0xbfc40c4c, interp=0x804f008, > yyscanner=0x8235678) at compilers/imcc/imcc.l:888 > #7 0xb7e71d71 in yylex (valp=0xbfc40c4c, yyscanner=0x8235678, > interp=0x804f008) > at compilers/imcc/imcc.l:385 > #8 0xb7e6b85d in yyparse (yyscanner=0x8235678, interp=0x804f008) > at compilers/imcc/imcparser.c:2598 > #9 0xb7e7856a in compile_to_bytecode (interp=0x804f008, > sourcefile=0xbfc41bb5 "src/CPP_PGE2AST.pir", > output_file=0xbfc41b94 "src/CPP_PGE2AST.pbc") at compilers/imcc/ > main.c:960 > #10 0xb7e788f6 in imcc_run (interp=0x804f008, > sourcefile=0xbfc41bb5 "src/CPP_PGE2AST.pir", argc=1, > argv=0xbfc40ec4) > at compilers/imcc/main.c:1060 > #11 0x0804896d in main (argc=1, argv=0xbfc40ec4) at src/main.c:62 > > compilers/imcc/imcc.l:888 seems to be where it goes off the rails.. > > IANACP, but there seems to be several calls to 'free(valp->s)' in > that function that aren't careful about not freeing that pointer more > than once.
Andy and I cleaned up a lot of these; can you reproduce it? -- c
