librsvg builds but causes segfaults

[dslm4515]

librsvg-2.50.7 compiles fine with a downloaded pre-built rust toolchain from www.rust-lang.org but when used, it segfaults:

[35343.845037] nwggrid-server[5960]: segfault at 55c6956e8a88 ip 00007f0fd6b54455 sp 00007ffcd58e6930 error 4 in librsvg-2.so.2.47.0[7f0fd6648000+579000]
[35343.845079] Code: 07 48 8d 15 4d b2 1e 00 0f b6 44 02 fc 83 c0 11 49 c7 c6 ff ff ff ff 89 c1 89 44 24 1c 49 d3 e6 4c 89 74 24 08 e9 03 fd ff ff <49> 8b 48 18 49 8b 50 10 41 83 ff 27 7e 1a 8b 44 24 1c 83 c0 02 41

If librsvg is replaced with an older version (2.40.18) that was not built with rust, segfault does not occur (in the example above, nwggrid does not not segault but runs.)

[dslm4515]

Perhaps, rust still needs to be built from source.