Show more detailed compiler error messages

src/closure.rs

@@ -17,9 +17,9 @@ use crate::{
 // interpreter. (Even though that gives slightly cleaner error messages).
 #[derive(Debug, Error)]
 pub enum CompilerError {
-    #[error("parse error")]
+    #[error("{0}")]
     Parsing(#[from] compiler::ParseError),
-    #[error("compile error")]
+    #[error("{0}")]
     Compilation(#[from] compiler::CompileError),
 }
 

src/compiler/parser.rs

@@ -333,7 +333,7 @@ pub enum ParseErrorKind {
     ExpressionNotStatement,
     #[error("recursion limit reached")]
     RecursionLimit,
-    #[error("lexer error")]
+    #[error("lexer error: {0}")]
     LexError(#[from] LexError),
     #[error("invalid attribute {0:?}")]
     InvalidAttribute(String),

tests/goldenscripts/close-multiple.lua

@@ -1,4 +1,4 @@
 --- error
---- runtime error: compile error: compiler error at line 4: multiple to-be-closed variables in local list
+--- runtime error: compiler error at line 4: multiple to-be-closed variables in local list
 
 local a <close>, b <close> = {}, {}

tests/goldenscripts/close-unimpl.lua

@@ -1,4 +1,4 @@
 --- error
---- runtime error: compile error: compiler error at line 4: close attribute currently unsupported
+--- runtime error: compiler error at line 4: close attribute currently unsupported
 
 local c <close> = {}

tests/goldenscripts/const1.lua

@@ -1,5 +1,5 @@
 --- error
---- runtime error: compile error: compiler error at line 5: cannot assign to a const variable
+--- runtime error: compiler error at line 5: cannot assign to a const variable
 
 local c <const> = 3
 c = 4

tests/goldenscripts/const3.lua

@@ -1,5 +1,5 @@
 --- error
---- runtime error: compile error: compiler error at line 5: cannot assign to a const variable
+--- runtime error: compiler error at line 5: cannot assign to a const variable
 
 local a <const> = 3
 function a()

tests/goldenscripts/const4.lua

@@ -1,5 +1,5 @@
 --- error
---- runtime error: compile error: compiler error at line 7: cannot assign to a const variable
+--- runtime error: compiler error at line 7: cannot assign to a const variable
 
 local a <const> = 3
 

tests/goldenscripts/const5.lua

@@ -1,5 +1,5 @@
 --- error
---- runtime error: compile error: compiler error at line 7: cannot assign to a const variable
+--- runtime error: compiler error at line 7: cannot assign to a const variable
 
 local a <const> = 5
 

tests/goldenscripts/lexer.lua

@@ -0,0 +1,4 @@
+--- error
+--- runtime error: parse error at line 4: lexer error: invalid escape sequence
+
+local p = "\-"