syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"\"'{s}'"}]}
source_snippet:                     "'{s}' is not a valid value for rustc-abi. \
context_before:                 return Err(format!(
context_after:                         Use 'x86-softfloat' or leave the field unset."