BDE 4.39.0 Release

Schedule

• The BDE team announces that the BDE 4.39.0 production release was completed on Monday, August 3, 2026.

Fixed Tickets

Summary
please address gtest-based test build errors
Rewrite sim_cpp11_features.pl as a Python script
hsl: NaN checks needed in multiplyIntervalByNumber and divideIntervalByNumber
LLVM libc++ does not provide std::ranges Neibloids in the <iterator> header
Please correct test driver compile warnings in bslmf on unix-linux---clang-21
Fix allocator use in ball_category.t.cpp
ball driveby fixes.
please correct compile warning in bslalg_numericformatterutil.t.cpp
please correct ubsan bslfmt_print and …imp test driver related warnings
please correct bsls_review.t.cpp compile warnings
bslim_standardheadertest.t hangs with VS 2026
Fix build failures on macOS in nightly test runs
Fix libcpp issue testing bit utilities for LLVM libc++
Formally deprecate the bslstl header for reference_wrapper
bdljsn::Json(Array|Object): pointers in initializer lists convert to`bool
Delete and_then and or_else for bdlb_NullableValue
Formally deprecate bslstl_referencewrapper
Warning on Linux/Clang in bsls_library features about unused variables in test driver
LLVM libc++ test failures for recently added component, bslim_bslforwardingheaders
BSLS_ASSERTTEST tests are discarded value expressions, and should be cast to void
Report build environment when a bsls component responsible for defining feature macros has a test that fails
Remove remaining MSVC 2013 workarounds
Fix bsic_bbhost SAFE run-time failures.
balber Decimal crashes on invalid payloads
Ubsan diagnostics in balber decoding of ‘double’
Contradiction in WriteOptions documentation