https://sourceware.org/bugzilla/show_bug.cgi?id=29389
--- Comment #8 from Luca Bacci <luca.bacci at outlook dot com> ---
I have now more insights into what's going on...
The issue stems from passing repeated import libs to the linker:
ld.bfd -o out ... subprojects/glib/gobject/libgobject-2.0.dll.a ...
"D:/msys64/mingw64/lib/libgobject-2.0.dll.a" ...
The contents of the two import libs are very similar, of course, They both look
like:
...
!<arch>
/ 0 0 0 0 28890 `
...
libgobject_2_0_0_dll_d000481.o/
libgobject_2_0_0_dll_d000481.o/
libgobject_2_0_0_dll_d000009.o/
libgobject_2_0_0_dll_d000480.o/
libgobject_2_0_0_dll_d000479.o/
libgobject_2_0_0_dll_d000478.o/
libgobject_2_0_0_dll_d000477.o/
libgobject_2_0_0_dll_d000476.o/
libgobject_2_0_0_dll_d000475.o/
libgobject_2_0_0_dll_d000474.o/
libgobject_2_0_0_dll_d000473.o/
libgobject_2_0_0_dll_d000472.o/
libgobject_2_0_0_dll_d000471.o/
libgobject_2_0_0_dll_d000470.o/
libgobject_2_0_0_dll_d000469.o/
libgobject_2_0_0_dll_d000468.o/
libgobject_2_0_0_dll_d000467.o/
libgobject_2_0_0_dll_d000466.o/
libgobject_2_0_0_dll_d000465.o/
...
By tracing calls to _bfd_coff_link_input_bfd() we get:
libgobject_2_0_0_dll_d000472.o
libgobject_2_0_0_dll_d000471.o
libgobject_2_0_0_dll_d000470.o
libgobject_2_0_0_dll_d000469.o
libgobject_2_0_0_dll_d000468.o
libgobject_2_0_0_dll_d000467.o
libgobject_2_0_0_dll_d000465.o
libgobject_2_0_0_dll_d000464.o
libgobject_2_0_0_dll_d000463.o
libgobject_2_0_0_dll_d000462.o
libgobject_2_0_0_dll_d000461.o
libgobject_2_0_0_dll_d000460.o
libgobject_2_0_0_dll_d000459.o
libgobject_2_0_0_dll_d000457.o
libgobject_2_0_0_dll_d000456.o
libgobject_2_0_0_dll_d000454.o
libgobject_2_0_0_dll_d000453.o
libgobject_2_0_0_dll_d000451.o
libgobject_2_0_0_dll_d000449.o
libgobject_2_0_0_dll_d000448.o
libgobject_2_0_0_dll_d000446.o
libgobject_2_0_0_dll_d000445.o
libgobject_2_0_0_dll_d000443.o
libgobject_2_0_0_dll_d000442.o
libgobject_2_0_0_dll_d000441.o
libgobject_2_0_0_dll_d000440.o
libgobject_2_0_0_dll_d000439.o
libgobject_2_0_0_dll_d000436.o
libgobject_2_0_0_dll_d000435.o
libgobject_2_0_0_dll_d000434.o
libgobject_2_0_0_dll_d000432.o
libgobject_2_0_0_dll_d000431.o
libgobject_2_0_0_dll_d000430.o
libgobject_2_0_0_dll_d000429.o
libgobject_2_0_0_dll_d000428.o
libgobject_2_0_0_dll_d000427.o
libgobject_2_0_0_dll_d000426.o
libgobject_2_0_0_dll_d000425.o
libgobject_2_0_0_dll_d000424.o
libgobject_2_0_0_dll_d000423.o
libgobject_2_0_0_dll_d000422.o
libgobject_2_0_0_dll_d000421.o
libgobject_2_0_0_dll_d000420.o
libgobject_2_0_0_dll_d000419.o
libgobject_2_0_0_dll_d000418.o
libgobject_2_0_0_dll_d000417.o
libgobject_2_0_0_dll_d000416.o
libgobject_2_0_0_dll_d000415.o
libgobject_2_0_0_dll_d000414.o
libgobject_2_0_0_dll_d000413.o
libgobject_2_0_0_dll_d000412.o
libgobject_2_0_0_dll_d000411.o
libgobject_2_0_0_dll_d000410.o
libgobject_2_0_0_dll_d000409.o
libgobject_2_0_0_dll_d000408.o
libgobject_2_0_0_dll_d000407.o
libgobject_2_0_0_dll_d000406.o
libgobject_2_0_0_dll_d000405.o
libgobject_2_0_0_dll_d000403.o
libgobject_2_0_0_dll_d000402.o
libgobject_2_0_0_dll_d000401.o
libgobject_2_0_0_dll_d000385.o
...
libgobject_2_0_0_dll_d000036.o
libgobject_2_0_0_dll_d000035.o
libgobject_2_0_0_dll_d000034.o
libgobject_2_0_0_dll_d000033.o
libgobject_2_0_0_dll_d000032.o
libgobject_2_0_0_dll_d000030.o
libgobject_2_0_0_dll_d000029.o
libgobject_2_0_0_dll_d000028.o
libgobject_2_0_0_dll_d000027.o
libgobject_2_0_0_dll_d000013.o
libgobject_2_0_0_dll_d000431.o <-- CRASH!
As you can see, the crash happens when executing _bfd_coff_link_input_bfd() the
first time with a repeated input_bfd->filename. There we use already freed
data.
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