1355002 - Building with warnings as error breaks with gcc 7 on -Werror=uninitialized

Status: RESOLVED DUPLICATE of bug 1387572

(Core :: Memory Allocator, defect)

Description

[Sylvestre Ledru [:Sylvestre]]

0:44.14 In file included from /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c:452:0:
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'extent_tree_szad_remove':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_r_s.link_szad.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15        | (((uintptr_t) (a_node)->a_field.rbn_right_red) & ((size_t)1))); \
 0:44.15                                         ^
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'extent_tree_ad_remove':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_r_s.link_ad.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'extent_tree_szad_insert':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_i_s.link_szad.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'extent_tree_ad_insert':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_i_s.link_ad.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_run_tree_remove':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_r_s.link.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_avail_tree_insert':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_i_s.link.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_avail_tree_remove':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_r_s.link.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_chunk_tree_dirty_remove':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_r_s.link_dirty.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_chunk_tree_dirty_insert':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_i_s.link_dirty.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/jemalloc.c: In function 'arena_run_tree_insert':
 0:44.15 /root/firefox-gcc-last/memory/mozjemalloc/rb.h:107:40: error: 'rbp_i_s.link.rbn_right_red' is used uninitialized in this function [-Werror=uninitialized]
 0:44.71 libdbm.a.desc

Comment 1

[Jan Beich]

Sylvestre, do you see the following one as well on Linux? If so change bugzilla component to General.

In file included from js/src/json.cpp:23:0,
                 from obj-x86_64-unknown-freebsd12.0/js/src/Unified_cpp_js_src26.cpp:11:
js/src/vm/JSONParser.h: In function 'bool js::ParseJSONWithReviver(JSContext*, mozilla::Range<const CharT>, JS::HandleValue, JS::MutableHandleValue) [with CharT = unsigned char]':
js/src/vm/JSONParser.h:129:59: error: '<anonymous>.js::JSONParserBase::v' is used uninitialized in this function [-Werror=uninitialized]
         freeProperties(mozilla::Move(other.freeProperties))
                                                           ^
js/src/vm/JSONParser.h: In function 'bool js::ParseJSONWithReviver(JSContext*, mozilla::Range<const CharT>, JS::HandleValue, JS::MutableHandleValue) [with CharT = char16_t]':
js/src/vm/JSONParser.h:129:59: error: '<anonymous>.js::JSONParserBase::v' is used uninitialized in this function [-Werror=uninitialized]
         freeProperties(mozilla::Move(other.freeProperties))
                                                           ^

Comment 2

[Sylvestre Ledru [:Sylvestre]]

Nope, I don't see that. Sorry

This one is a dup actually