Re: A malloc error in C++ - incorrect checksum for freed object
giacomomonari@email.it wrote:
Hello everyone,
I wrote a program in C++ (called lab3_1) that compiled has no errors,
but when I run it returns in the Run Log this error that doesn't
allow
it to terminate correctly:
lab3_1(1545) malloc: *** error for object 0x1804400: incorrect
checksum for freed object - object was probably modified after being
freed, break at szone_error to debug
lab3_1(1545) malloc: *** set a breakpoint in szone_error to debug
lab3_1 has exited due to signal 11 (SIGSEGV).
The main of the program is:
[...incomplete code with a bunch of 3rd party thingamajigs...]
Note that before returning that error message the program does
correctly its work (but returning a wrong graphic with gnuplot).
I'm using in this program an header I created, "dataAnalysis.h", that
in other programs hadn't problems... So I don't understand if it is
that header's fault... What could it be?
<shrug> Memory overrun.
Either run it under a tool that would actually watch your memory
access, like BoundsChecker (if you're on Windows), or narrow it down
to the actual statement[s] causing your memory overrun. I recommend
the latter, since it's easier (no need to look for the tool). Just
comment out anything non-essential, and see if it still bombs. If
it doesn't, start re-adding things back, and see when it again croaks.
Then analyse further.
V
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