multiple in flight appendentries - #2
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Second Group-4 reshape, same recipe as logging.cpp: the Linux print_stack_trace body shrinks to three micro-kernels + a one-line fputs sink, and the report assembly moves into DSL `fn bt_render`. - DSL core bt_render: resolution loop, column-width (max_len) computation, alignment-padding loop, report assembly. New verified lowerings: Vec::<T>::new() turbofish on a C++ aggregate element type, rusty::len(field), indexing chains lines[k].name.size(), early `return` of a std::string local. - Kernels (@unsafe, the irreducible C surface): bt_capture (backtrace/backtrace_symbols/free + addr2line command build), bt_resolve_at (popen/pclose; indexes the capture on the C++ side so the DSL never borrows a container element), bt_index_prefix (snprintf "%-3d "), bt_empty_string factory. - BtLine/BtCapture plain C++ aggregates carry the data across the kernel/DSL boundary; move-hazards designed out by reading name_len before any append. - Output byte-identical; __APPLE__ branch untouched (not compilable here, documented). Co-Authored-By: Claude Opus 4.8 <[email protected]> Claude-Session: https://claude.ai/code/session_01N9DLY5SDRooowERihphNQ1
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Temporary pull request to test multiple in flight append entries