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json_pointer.c: initialize idx #839

Merged
merged 1 commit into from
Nov 8, 2023
Merged

json_pointer.c: initialize idx #839

merged 1 commit into from
Nov 8, 2023

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ffontaine
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Fix the following build failure with gcc 5:

/home/thomas/autobuild/instance-2/output-1/build/json-c-0.17/json_pointer.c: In function 'json_pointer_result_get_recursive': /home/thomas/autobuild/instance-2/output-1/build/json-c-0.17/json_pointer.c:193:25: error: 'idx' may be used uninitialized in this function [-Werror=maybe-uninitialized]
    res->index_in_parent = idx;
                         ^

Fixes:

Fix the following build failure with gcc 5:

/home/thomas/autobuild/instance-2/output-1/build/json-c-0.17/json_pointer.c: In function 'json_pointer_result_get_recursive':
/home/thomas/autobuild/instance-2/output-1/build/json-c-0.17/json_pointer.c:193:25: error: 'idx' may be used uninitialized in this function [-Werror=maybe-uninitialized]
    res->index_in_parent = idx;
                         ^

Fixes:
 - http://autobuild.buildroot.org/results/523b35a979d59121fe4e18c38171792b06233940/

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
@hawicz
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hawicz commented Nov 8, 2023

gcc 5 is rather old, but I suppose it's not necessarily incorrect about the warning. However, an idx of 0 is a valid index, please initialize it to -1 instead

@ffontaine
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idx is defined as size_t which is unsigned, I can't initialize it to -1 ...

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hawicz commented Nov 8, 2023

d'oh! er.. well, how about SIZE_T_MAX - 170, to use a value that stands out a bit if it ever expectedly "leaks out".

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hawicz commented Nov 8, 2023

never mind, I'll just merge it as-is

@hawicz hawicz merged commit 3333752 into json-c:master Nov 8, 2023
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2 participants