https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122886
Bug ID: 122886
Summary: rust/backend/rust-constexpr.cc:3141: Possible uninit
local variable ?
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rust
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
CC: dkm at gcc dot gnu.org, gcc-rust at gcc dot gnu.org,
pierre-emmanuel.patry at embecosm dot com
Target Milestone: ---
I had another go at compiling the Rust compiler with clang
and got the following:
rust/backend/rust-constexpr.cc:3141:8: warning: variable 'eq' is
used uninitialized whenever '&&' condition is false [-Wsometimes-uninitialized]
Source code is
bool eq;
if (TREE_CODE (lmem) == TREE_CODE (rmem)
&& TREE_CODE (lmem) == FIELD_DECL
&& TREE_CODE (DECL_CONTEXT (lmem)) == UNION_TYPE
&& same_type_p (DECL_CONTEXT (lmem), DECL_CONTEXT (rmem)))
/* If both refer to (possibly different) members of the same union
(12.3), they compare equal. */
eq = true;
// else
// eq = cp_tree_equal (lhs, rhs);
r = constant_boolean_node (eq == is_code_eq, type);
it might be wise to init local variable eq at its declaration.
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