[Merged by Bors] - Fixed #1768

[Razican]

This Pull Request fixes/closes #1768.

It adds one extra peeked token in the buffered lexer, since it didn't take into account that the stream might end just after the last peeked token. The panic was only happening in debug mode, but still, this was wrong.

[Razican]

bors r+

[bors]

🕐 Waiting for PR status (Github check) to be set, probably by CI. Bors will automatically try to run when all required PR statuses are set.

[github-actions]

Test262 conformance changes

VM implementation

Test result	main count	PR count	difference
Total	87,912	87,912	0
Passed	40,892	40,892	0
Ignored	19,929	19,929	0
Failed	27,091	27,091	0
Panics	0	0	0
Conformance	46.51%	46.51%	0.00%

[codecov]

Codecov Report

Merging #1820 (7aa59ea) into main (55e85ad) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1820   +/-   ##
=======================================
  Coverage   55.73%   55.73%           
=======================================
  Files         201      201           
  Lines       17326    17326           
=======================================
  Hits         9656     9656           
  Misses       7670     7670           

Impacted Files	Coverage Δ
boa/src/syntax/parser/cursor/buffered_lexer/mod.rs	79.72% <ø> (ø)
boa/src/syntax/parser/expression/assignment/mod.rs	39.17% <ø> (ø)

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[github-actions]

Benchmark for 7f2bf40

Click to view benchmark

Test	Base	PR	%
Arithmetic operations (Compiler)	393.4±0.55ns	395.9±0.75ns	+0.64%
Arithmetic operations (Execution)	1919.9±2.75ns	1951.3±2.18ns	+1.64%
Arithmetic operations (Parser)	5.8±0.01µs	5.7±0.01µs	-1.72%
Array access (Compiler)	835.2±1.75ns	835.9±1.92ns	+0.08%
Array access (Execution)	10.5±0.26µs	10.5±0.03µs	0.00%
Array access (Parser)	12.5±0.13µs	12.2±0.02µs	-2.40%
Array creation (Compiler)	1194.9±5.40ns	1180.1±2.93ns	-1.24%
Array creation (Execution)	3.1±0.01ms	3.2±0.00ms	+3.23%
Array creation (Parser)	13.8±0.02µs	13.5±0.02µs	-2.17%
Array pop (Compiler)	2.8±0.01µs	2.9±0.00µs	+3.57%
Array pop (Execution)	1327.9±5.18µs	1348.1±11.14µs	+1.52%
Array pop (Parser)	143.1±0.16µs	144.1±0.16µs	+0.70%
Boolean Object Access (Compiler)	687.6±1.15ns	705.7±0.92ns	+2.63%
Boolean Object Access (Execution)	6.7±0.03µs	6.9±0.03µs	+2.99%
Boolean Object Access (Parser)	14.4±0.01µs	14.4±0.01µs	0.00%
Clean js (Compiler)	2.2±0.01µs	2.2±0.01µs	0.00%
Clean js (Execution)	1447.2±9.53µs	1468.2±12.61µs	+1.45%
Clean js (Parser)	29.8±0.07µs	29.6±0.04µs	-0.67%
Create Realm	331.1±3.48ns	335.3±1.31ns	+1.27%
Dynamic Object Property Access (Compiler)	1168.7±4.35ns	1163.0±3.16ns	-0.49%
Dynamic Object Property Access (Execution)	6.9±0.07µs	6.9±0.04µs	0.00%
Dynamic Object Property Access (Parser)	11.0±0.02µs	10.9±0.02µs	-0.91%
Fibonacci (Compiler)	1520.1±4.69ns	1472.3±3.51ns	-3.14%
Fibonacci (Execution)	2.8±0.00ms	2.8±0.01ms	0.00%
Fibonacci (Parser)	16.7±0.02µs	16.4±0.02µs	-1.80%
For loop (Compiler)	1282.9±7.98ns	1277.3±7.06ns	-0.44%
For loop (Execution)	42.9±0.14µs	43.8±0.17µs	+2.10%
For loop (Parser)	14.3±0.02µs	14.2±0.02µs	-0.70%
Mini js (Compiler)	2.2±0.00µs	2.2±0.00µs	0.00%
Mini js (Execution)	1336.6±10.37µs	1360.0±6.85µs	+1.75%
Mini js (Parser)	26.4±0.02µs	25.9±0.04µs	-1.89%
Number Object Access (Compiler)	643.1±1.37ns	659.9±1.47ns	+2.61%
Number Object Access (Execution)	5.3±0.01µs	5.4±0.02µs	+1.89%
Number Object Access (Parser)	11.4±0.01µs	11.3±0.01µs	-0.88%
Object Creation (Compiler)	957.3±2.11ns	958.0±1.82ns	+0.07%
Object Creation (Execution)	6.2±0.02µs	6.2±0.02µs	0.00%
Object Creation (Parser)	9.5±0.02µs	9.3±0.02µs	-2.11%
RegExp (Compiler)	1134.0±1.76ns	1146.2±2.25ns	+1.08%
RegExp (Execution)	13.0±0.03µs	12.8±0.03µs	-1.54%
RegExp (Parser)	10.5±0.01µs	10.3±0.02µs	-1.90%
RegExp Creation (Compiler)	1018.4±3.82ns	1048.6±3.10ns	+2.97%
RegExp Creation (Execution)	9.9±0.05µs	9.5±0.04µs	-4.04%
RegExp Creation (Parser)	8.7±0.01µs	8.6±0.02µs	-1.15%
RegExp Literal (Compiler)	1147.2±2.78ns	1137.3±0.95ns	-0.86%
RegExp Literal (Execution)	13.1±0.05µs	12.8±0.05µs	-2.29%
RegExp Literal (Parser)	8.4±0.01µs	8.2±0.01µs	-2.38%
RegExp Literal Creation (Compiler)	1024.3±3.41ns	1053.7±6.17ns	+2.87%
RegExp Literal Creation (Execution)	9.9±0.05µs	9.6±0.05µs	-3.03%
RegExp Literal Creation (Parser)	6.6±0.01µs	6.5±0.01µs	-1.52%
Static Object Property Access (Compiler)	973.1±2.50ns	982.2±2.76ns	+0.94%
Static Object Property Access (Execution)	6.4±0.04µs	6.5±0.02µs	+1.56%
Static Object Property Access (Parser)	10.2±0.01µs	10.0±0.02µs	-1.96%
String Object Access (Compiler)	1026.8±6.03ns	1035.8±3.98ns	+0.88%
String Object Access (Execution)	8.6±0.02µs	8.7±0.02µs	+1.16%
String Object Access (Parser)	14.3±0.06µs	14.1±0.02µs	-1.40%
String comparison (Compiler)	1301.0±4.82ns	1287.6±3.29ns	-1.03%
String comparison (Execution)	7.2±0.03µs	7.2±0.03µs	0.00%
String comparison (Parser)	11.3±0.02µs	11.2±0.03µs	-0.88%
String concatenation (Compiler)	1050.4±3.16ns	1065.6±2.63ns	+1.45%
String concatenation (Execution)	6.2±0.02µs	6.2±0.02µs	0.00%
String concatenation (Parser)	7.8±0.01µs	7.7±0.02µs	-1.28%
String copy (Compiler)	883.6±2.41ns	881.1±2.89ns	-0.28%
String copy (Execution)	5.3±0.01µs	5.4±0.02µs	+1.89%
String copy (Parser)	5.8±0.01µs	5.7±0.01µs	-1.72%
Symbols (Compiler)	639.1±1.79ns	650.3±4.82ns	+1.75%
Symbols (Execution)	4.9±0.01µs	5.0±0.01µs	+2.04%
Symbols (Parser)	4.4±0.02µs	4.4±0.01µs	0.00%

[Razican]

bors r+

[bors]

Pull request successfully merged into main.

Build succeeded:

• Clippy
• Documentation
• Examples
• Rustfmt
• Tests on Linux
• Tests on MacOS
• Tests on Windows