LFUDTSRC_LINE (0x1606) - UDT Source Line

Specifies the source location for the definition of a user-defined type (UDT).

struct UdtSrcLine {
    TypeIndex type;
    NameIndex file_name;
    uint32_t line;
};

Source code comments in cvinfo.h imply that this record is generated by the compiler, not the linker. There is some suggestion that LF_UDT_SRC_LINE records do not appear in linker PDBs, but instead are found in compiler PDBs, and that the linker converts LF_UDT_SRC_LINE records to LF_UDT_MOD_SRC_LINE during linking.

type is the type being described.

file_name points into the Names Stream and specifies the file name.

line is the 1-based line number of the definition of the UDT.